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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →catapult.exe is a filename, not a unique Windows component. The best-documented legitimate copy is Catapult, the graphical front end for the openMSX MSX emulator, but unrelated software uses the same name. A filename alone cannot establish that a file is safe or malicious. Check the complete path, owning program, publisher signature, version, hash, download source and security-scan result before running, deleting or replacing it.
What catapult.exe can be
Windows identifies an executable primarily by its path and program metadata, not by its filename. That means two files named catapult.exe can be completely unrelated. The file may be legitimate, damaged, unwanted or malicious depending on where it came from and what it does.
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| Possible identity | What it does | Clues to check |
|---|---|---|
| openMSX Catapult | A graphical front end for the openMSX MSX emulator. | An openMSX installation directory, its documented resource folders, and the runtime files required by the particular build. |
| Catapult – AI Version | A Windows game from Deep-Fold that ships a separate executable with the same filename. | The game’s installation folder, installer and publisher information. |
| Other vendor software | Search results show additional programs using the name. | The complete path, signer, version, hash and download source. |
| Suspicious or malicious sample | A sample analyzed by ANY.RUN on April 25, 2025, used a Catapult-named client/server file and showed behaviors such as service execution and command-shell activity. | Unexpected persistence, shell launches, a suspicious delivery method or a detection from security software. The report itself says its observations are not a guarantee of maliciousness or safety. |
The openMSX Catapult program
openMSX documents a Windows executable named Catapult.exe. It is not a self-contained file in every distribution: the program expects resource directories to remain in locations relative to the executable. The manual specifically documents resources such as resources/dialogs and resources/bitmaps. Moving only the executable, deleting those folders or launching it from a different layout can produce startup failures even when the binary itself is genuine.
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Some MinGW builds also need runtime libraries alongside the executable or on the system PATH. The documented dependencies include libxml2.dll (or libxml2-2.dll) and mingwm10.dll. A missing dependency can result in a Windows message saying that a DLL was not found or that the application could not start.
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Why the same name does not prove a virus
The separate Catapult – AI Version game demonstrates that the name is reused by unrelated legitimate software. Conversely, a familiar name does not make an unknown download trustworthy. A cracked installer, torrent, unofficial “codec” package or browser pop-up can place a counterfeit executable in a directory that has nothing to do with the real application.
Is catapult.exe safe?
There is no universal yes-or-no answer. A copy in the expected openMSX directory, obtained from the openMSX project, carrying a valid matching signature and passing an up-to-date Defender scan is consistent with the legitimate emulator. A copy in a temporary, Downloads or startup directory, an altered or unsigned binary, or one delivered by a scareware page deserves investigation. An absent signature is a warning, not conclusive proof of malware, because not every legitimate developer signs every build.
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| Evidence | What it suggests | How to interpret it |
|---|---|---|
| Path belongs to the application you intentionally installed | Lower risk | Confirm that the application and installer came from its official publisher. |
| Unexpected path such as a temporary, browser-download or startup folder | Higher risk | Do not run it merely because the filename looks familiar. |
| Digital signature is valid and the signer is the expected publisher | Supports authenticity | It does not prove the file is harmless, but a mismatch is significant. |
| Defender detects the file or its containing folder | High concern | Quarantine it and investigate the source rather than creating an exclusion. |
| It launches shells, scripts, services or persistence without an expected reason | High concern | Isolate the computer and perform a full security review. |
| It can be reproduced by reinstalling the named official application | Supports legitimacy | Compare the replacement’s path, signer, version and hash with the original. |
How to identify your copy safely
Do this before deleting, replacing or allowing the process through a security prompt. If the file is actively running and you suspect compromise, disconnect the computer from the network first and then follow the malware-response steps below.
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catapult.exeprocess and choose Open file location. If the file appears in an alert, use the alert’s location option. Record the complete path, file size, version and creation date. Also note which installed application owns that folder. - Check the file properties. Right-click the file, choose Properties, and review the Details tab for product name, company, description and file version. Treat a blank or contradictory description as a reason to investigate, not as a final verdict.
- Validate the signature. On the Digital Signatures tab, select a signature and choose Details. Windows should report that the signature is valid, and the signer should match the publisher you expected. A signature on a different file, a failed timestamp or a signer you do not recognize requires caution.
- Scan the file and folder. Right-click the executable or its containing folder and choose the Microsoft Defender scan option. Update Defender’s security intelligence first. If the file is not in use, scan the entire folder as well as the executable.
- Run a full scan for broader symptoms. In Windows Security, open Virus & threat protection, choose Scan options, select Full scan and start it. A single clean result for the executable does not rule out another file in the same installer or a persistence mechanism elsewhere.
- Record a comparison hash. In PowerShell, run
Get-FileHash -Algorithm SHA256 "C:pathtocatapult.exe", replacing the path with the exact location you recorded. Compare the resulting hash with one published by the software’s official distributor, if one is available. A hash that does not match means the files differ; it does not, by itself, explain why. - Check provenance. Ask how the file arrived. An official installer for a program you chose is materially different from a crack, torrent, unsolicited email attachment or browser pop-up. Microsoft advises downloading software from the official vendor’s website because third-party bundles and peer-to-peer downloads can include malware or potentially unwanted software.
Warning signs that the file should be treated as malware
- The path is unrelated to any application you installed, or the file recreates itself after deletion.
- The signer is absent, unexpected or invalid and the file came from an unofficial source.
- Defender or another reputable security product detects it.
- It creates a scheduled task, service, startup entry or other persistence that you did not authorize.
- It launches
cmd.exe, PowerShell or scripts without a clear reason connected to the parent program. - It arrived through a page that told you to call a phone number, install remote-support software or disable security controls.
Microsoft states that genuine Microsoft error and warning messages never include phone numbers. A pop-up that displays a number and pressures you to call is a support-scam indicator, not evidence that catapult.exe itself is a Windows component.
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How to fix legitimate openMSX catapult.exe errors
Use these steps only after the identity and source of the file are clear. They target the documented openMSX Catapult layout; they will not repair an unrelated program that happens to use the same filename.
1. Restore the complete package
- Close Catapult and openMSX, then back up any personal configuration or emulator data you need to keep.
- Uninstall the affected openMSX build if it is listed in Settings → Apps → Installed apps. If it is a portable package, remove only the damaged application copy after preserving your data.
- Download the matching official openMSX package again and extract or install it as a complete unit. Do not copy a single
catapult.exefrom another computer. - Launch the executable from the package’s intended directory. Running it from an archive viewer or moving it away from its companion folders can break relative paths.
2. Restore the relative resource directories
Keep the documented resource structure beside the executable. In particular, verify that directories such as resources/dialogs and resources/bitmaps exist in the relative locations expected by your build. If Windows reports missing interface assets, re-extract the official archive instead of downloading individual resource files from an unrelated site.
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3. Restore MinGW runtime DLLs when the build requires them
For a MinGW-built copy, check that libxml2.dll or libxml2-2.dll and mingwm10.dll are in the same directory as Catapult or are available through the documented PATH. Use the files supplied with the matching openMSX package. Do not obtain replacement DLLs from random “DLL download” websites, where files may be modified or bundled with unwanted software.
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More than one installation can leave multiple catapult.exe files on a computer. Use Task Manager’s Open file location command and any desktop shortcut’s Properties to verify the target. Correct the shortcut or remove the obsolete installation only after you have confirmed which copy contains your settings and ROM paths.
5. Investigate a hang or “stopped responding” message
An application hang is a troubleshooting symptom, not proof of malware. One Windows event-log example identifies C:Program FilesopenMSXCatapultbincatapult.exe, version 16.0.0.0, as the hung application. That event does not establish that every file named catapult.exe is unsafe.
- Open Event Viewer by searching for it from Start.
- Go to Windows Logs → Application and locate the event at the time of the failure.
- Record the faulting application, faulting module, exception code and exact path. A faulting module can distinguish a missing runtime, graphics component or damaged application file from a Catapult-specific problem.
- Apply the matching openMSX build’s documented updates and test again with the complete package. If the event names a graphics or runtime component, update that component only from a trusted vendor source.
6. Rule out configuration and environment conflicts
- Temporarily move a damaged or newly changed Catapult configuration out of the way, then start with a clean configuration. Preserve a backup so you can restore settings gradually.
- Test from a normal local folder rather than a removable, synchronized or network location.
- Close overlays, screen recorders and other programs that hook into graphics windows, then retry.
- Check that your Windows account has read access to the application directory and write access wherever the program stores its configuration or logs.
- If only one ROM, skin or emulator setting triggers the crash, remove that item and add it back after confirming that the base program starts.
General fixes when another program’s catapult.exe crashes
If the path belongs to a game or another vendor rather than openMSX, use that application’s own support and installation files. The following sequence avoids mixing files between unrelated products.
- Capture the exact message. “The application was unable to start,” “missing DLL,” “has stopped working” and “not responding” indicate different failure classes. Record the complete text, error code and time.
- Reinstall from the original publisher. Uninstall the named application, restart Windows, and install a current package from its official source. Keep the installer and executable from the same release.
- Check Event Viewer. Use the application log to identify the faulting module and exception. Do not replace a system DLL merely because its name appears in an event; first verify which application supplied it.
- Repair supported runtimes or drivers. If the publisher specifies a runtime, graphics component or driver, use the publisher’s instructions and official download. Avoid “one-click DLL fixer” utilities and random DLL repositories.
- Test security software interactions carefully. Never disable protection permanently. If a clean, signed application is blocked, consult the publisher’s documented compatibility guidance and restore all protections after testing.
- Use a clean reinstall as the final software step. Remove leftover folders only after backing up saves and settings, then install to a new directory. This helps distinguish a damaged installation from a system-wide problem.
Can you delete catapult.exe?
| Situation | Safer action |
|---|---|
| It is inside an openMSX installation you still use | Do not delete the executable alone. Repair or reinstall the complete package so resources and runtime files remain consistent. |
| It belongs to a game or other application you no longer want | Uninstall that application through Windows first. Remove leftovers only after confirming they are not shared data. |
| It is in Downloads, Temp or a startup location and has no identifiable owner | Quarantine or remove it after scanning, then investigate how it arrived and whether it created persistence. |
| Defender detects it or its behavior is suspicious | Use quarantine and a full scan rather than manual deletion alone. Manual deletion can leave services, scheduled tasks or other components behind. |
| You found several copies | Compare each path, signer, version, hash, source and companion files. Delete only the copy tied to an unwanted installation after the comparison. |
Deleting a legitimate executable can make its application fail, while deleting only one file from a malicious bundle may not remove the threat. Identify the owning program first.
What to do if you suspect compromise
- Disconnect from the network if the computer is showing active suspicious behavior, while leaving enough connectivity for you to obtain trusted security updates when appropriate.
- Do not open the file again, approve an unexpected elevation request or create an antivirus exclusion to make it run.
- Use updated Microsoft Defender security intelligence and run a full scan. Follow its quarantine or removal recommendation.
- Review startup applications, scheduled tasks and services for entries created at the time the file appeared. Remove only entries you can confidently associate with the unwanted software.
- If you entered passwords after running the file, change those credentials from a known-clean device and enable multifactor authentication where available.
- For a work or shared computer, preserve the alert, path, hash and event-log details and contact the administrator. Do not destroy evidence by repeatedly copying or modifying the file.
How to compare two catapult.exe files
When Windows or a security alert shows more than one copy, compare the files systematically rather than choosing the one with the shorter path or newest date.
| Comparison axis | Questions to answer |
|---|---|
| Full path and owning application | Which installed program contains it, and does that program explain why it is running? |
| Publisher and signature | Is the signature valid, and does the signer match the expected vendor? |
| Version and file metadata | Do product name, description and version match the release you installed? |
| SHA-256 hash | Does it match an official hash for the same release, if the publisher supplies one? |
| Download source | Did it come from an official installer, or from a crack, torrent, bundle or pop-up? |
| Companion files | For openMSX, are the expected resource folders and, where applicable, MinGW DLLs present? |
| Security reputation | Does an updated Defender scan flag the file or its folder? |
| Persistence and behavior | Does it create services, scheduled tasks, scripts or shell activity that the owning application does not need? |
| Reproducibility | Can a clean reinstall of the official application recreate the same file and metadata? |
Bottom line: identify the path before taking action
catapult.exe is not inherently a virus and is not inherently safe. The openMSX Catapult front end is a documented legitimate use, and other software uses the same filename. Path, publisher, signature, hash, provenance, companion files and scan results determine the risk. For an openMSX error, restore the complete package, preserve its relative resources and verify the required runtime DLLs. For an unknown or suspicious copy, quarantine and scan it instead of launching or deleting it blindly. A Microsoft-style warning that includes a phone number is a scam signal, not a normal Windows error.
Quick Recap
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