The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Yes—Windows can load supported CPU microcode during boot without rewriting your motherboard’s BIOS/UEFI. Use Windows Update first. If you have an Intel processor and Windows does not offer the needed fix, you can install a matching package from the Microsoft Update Catalog. AMD systems generally use the manufacturer’s BIOS/UEFI or laptop-firmware channel instead. A Windows-loaded revision is not a permanent rewrite of the processor and cannot replace platform firmware when the fix extends beyond CPU microcode.
What a microcode update actually changes
Microcode is processor-internal firmware that changes how a particular CPU family, model and stepping behaves. Updates can address security vulnerabilities, documented errata, stability problems, compatibility issues and CPU behavior required by operating-system mitigations.
It is not a normal CPU driver, a BIOS replacement, a permanent rewrite of the processor, or a conventional performance upgrade. Firmware can load microcode before the operating system starts; on supported systems, Windows can load a signed, compatible revision during boot. Intel describes both approaches in its OS microcode guidance.
Windows loads the revision for that boot rather than changing the motherboard’s SPI flash image. Firmware may load one revision first, with Windows replacing it with a newer compatible revision if one is available. Another operating system, hypervisor or a later boot may follow a different microcode path.
Recommended Free Tools
#1 Best Overall
- CONSISTENT QUALITY: Our thermal paste packaging design has evolved over time, but the formula has remained the same, ensuring reliable performance.
- EXCELLENT PERFORMANCE: ARCTIC MX-4 thermal paste is made of carbon microparticles, guaranteeing extremely high thermal conductivity. This ensures that heat from the CPU/GPU is dissipated quickly & efficiently
- SAFE APPLICATION: The MX-4 is metal-free and non-electrical conductive which eliminates any risks of causing short circuit, adding more protection to the CPU and VGA cards
- HIGH DURABILITY: In contrast to metal and silicon thermal compound, the MX-4 does not compromise over time. Once applied, you do not need to apply it again as it will last at least for 8 years
- EASY TO APPLY: With an ideal consistency, the MX-4 is very easy to use, even for beginners
Before you install anything
- Have administrator access.
- Record the exact CPU identity, Windows edition and version, architecture and OS build.
- Use only Windows Update, the Microsoft Update Catalog, your OEM firmware support page, or documented Intel/AMD sources.
- Do not use modified BIOS images, random ZIP files, unsigned drivers or forum-hosted microcode loaders for a normal Windows installation.
Intel treats OS-loaded microcode as security-sensitive material and advises following the operating-system vendor’s installation and integrity-verification procedures (Intel guidance).
1. Identify the CPU and Windows build
PowerShell
Get-CimInstance Win32_Processor |
Select-Object Name, Manufacturer, Family, Model, SteppingThe commercial model name is useful, but Intel microcode references are matched by family, model, stepping or CPUID. For Intel systems, Intel’s Processor Identification Utility can provide additional identification details.
Windows details
Get-ComputerInfo |
Select-Object WindowsProductName, WindowsVersion, OsBuildNumber, OsArchitectureOn Windows 11, release and build context is maintained on Microsoft’s Windows 11 release information page. A cumulative-update build number alone does not prove that a particular CPU microcode revision is installed.
2. Check the microcode revision currently active
On Intel Windows installations, Intel documents this registry value:
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsRank #2
- WELL PROVEN QUALITY: The design of our thermal paste packagings has changed several times, the formula of the composition has remained unchanged, so our MX pastes have stood for high quality
- EXCELLENT PERFORMANCE: ARCTIC MX-4 thermal paste is made of carbon microparticles, guaranteeing extremely high thermal conductivity. This ensures that heat from the CPU/GPU is dissipated quickly & efficiently
- SAFE APPLICATION: The MX-4 is metal-free and non-electrical conductive which eliminates any risks of causing short circuit, adding more protection to the CPU and VGA cards
- 100 % ORIGINAL THROUGH AUTHENTICITY CHECK: Through our Authenticity Check, it is possible to verify the authenticity of every single product
- EASY TO APPLY: With an ideal consistency, the MX-4 is very easy to use, even for beginners, Spatula incl.
reg query HKLMHARDWAREDESCRIPTIONSystemCentralProcessor /v "Update Revision"Equivalent PowerShell:
Get-ItemProperty `
-Path 'HKLM:HARDWAREDESCRIPTIONSystemCentralProcessor ' `
-Name 'Update Revision'To display the raw value as hexadecimal:
$path = 'HKLM:HARDWAREDESCRIPTIONSystemCentralProcessor '
$raw = (Get-ItemProperty -Path $path -Name 'Update Revision').'Update Revision'
'0x{0:X}' -f [BitConverter]::ToUInt32($raw, 0)Some Windows builds also expose Previous Update Revision. That field is commonly associated with an earlier or firmware-provided revision, while Update Revision is the revision Windows loaded, but fields and interpretations are not identical across every build and diagnostic utility. Compare the post-reboot registry value with a trusted hardware utility and the processor-specific vendor information.
3. Install through Windows Update first
Windows 11
- Open Settings.
- Select Windows Update.
- Select Check for updates.
- Install applicable quality, cumulative and optional firmware-related updates.
- Restart when prompted.
- Run the revision check again after Windows has restarted.
Labels vary by edition and servicing channel, so use the current Windows Update page rather than relying on an old screenshot. Microsoft documents Intel microcode distribution through Windows Update, WSUS and the Catalog in KB4073757.
Windows 10 and Windows Server
- Open Settings.
- Select Update & Security, then Windows Update.
- Select Check for updates.
- Install applicable updates and restart.
Availability depends on the Windows version, servicing status, processor and update channel. Microsoft’s standalone Intel package model is described in KB4100347.
4. Install an Intel package manually from the Update Catalog
Use the Catalog when Windows Update does not offer the package, the computer is offline, an administrator needs a standalone .msu, or organizational policy requires controlled deployment.
Rank #3
- SAFETY APPLICATION: BSFF is metal-free and non-conductive, which eliminates any risk of short circuit and adds more protection to the CPU and VGA card.
- BETTER THAN LIQUID METAL: It is made of carbon microparticles, guaranteeing extremely high thermal conductivity. This ensures that heat from the CPU/GPU is dissipated quickly & efficiently.
- HIGH DURABILITY: BSFF thermal paste Edition formula has excellent component heat dissipation performance and has the stability to push the system to the limit.
- EXCELLENT PERFORMANCE: In contrast to metal and silicon thermal conductive adhesives, BSFF thermal paste will not compromise over time. After applying, you do not need to apply again because it will last at least 5 years.
- EASY TO APPLY: BSFF thermal paste has ideal consistency and is very easy to use even for beginners
- Record the CPU manufacturer, exact model, Windows version, architecture (normally x64) and current OS build.
- Open the Microsoft Update Catalog.
- Search for
Intel microcode, an applicable KB number, and your Windows version or architecture. - Read the package description, applicability and supersedence information.
- Download only the package matching your Windows edition, version, architecture and supported CPU coverage.
- Install it, restart, and check the revision again.
Microsoft explains Catalog download and administrative deployment through its WSUS and Catalog documentation.
Install from the command line
wusa.exe C:PathToUpdate.msuFor a quiet installation with an automatic restart option:
wusa.exe C:PathToUpdate.msu /quiet /norestartDo not install an arbitrary file merely because its title contains “microcode.” Applicability depends on Windows version, architecture, CPU support, package supersedence and prerequisites. A package may contain updates for several processor identifiers; the revision only changes if your CPU is covered and the package is newer.
5. Intel and AMD use different practical paths
Intel
Intel systems may receive microcode through BIOS/UEFI, Windows Update, the Microsoft Update Catalog, WSUS or enterprise management. Intel recommends manufacturer firmware where possible because it loads earlier and can include related platform changes (Intel Microcode Update Guidance).
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #4
- NEXT-LEVEL THERMAL PERFORMANCE: MX-7 features a performance-optimized, dense, and highly viscous consistency. Its high filler content ensures exceptional heat transfer
- LONG-TERM STABILITY: High cohesion prevents pump-out, dry-out, or bleeding even under repeated thermal cycles, ensuring long-lasting and consistent performance without the need for frequent reapplication
- PERFECT APPLICATION: MX-7 cannot be spread manually by design. Its low adhesion allows the paste to distribute naturally under cooler pressure, forming a thin bond line without trapping air bubbles
- SAFE FOR ALL DEVICES: MX-7 is electrically non-conductive and non-capacitive, making it completely safe for CPUs, GPUs, laptops, consoles, and other, no risk of short circuits or electrical discharge
- INCLUDES MX CLEANER: Thoroughly removes old thermal paste and prepares contact surfaces for optimal performance before applying new thermal compound.
AMD
Do not assume Intel’s Catalog workflow has a generic AMD equivalent. Microsoft’s public guidance generally directs AMD users to motherboard, laptop or OEM firmware. A Windows cumulative update may include AMD-related components or mitigations, but that is not the same as a universal standalone AMD microcode download. Check the system manufacturer’s support page and release notes (Microsoft KB4073757).
6. Determine whether the installed revision is actually newer
Compare all of these for the same CPU and platform:
- The active Windows revision after reboot.
- The revision described by the applicable Microsoft package.
- Intel’s information for the matching family, model and stepping.
- The BIOS/UEFI or hardware diagnostic revision.
A higher hexadecimal value often represents a newer revision, but numbering is vendor-specific and a later-looking value may not apply to your exact CPUID. Microsoft’s package may lag an OEM or Intel firmware release, and a CPU can have a newer BIOS revision without any Windows-distributed package.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.7. Troubleshoot common outcomes
Windows Update says the PC is current
That means no applicable update is currently offered through that channel—not that your CPU has the newest revision available anywhere. Check the active revision, the Catalog and the OEM support page.
Best Value
- NEXT-LEVEL THERMAL PERFORMANCE: MX-7 features a performance-optimized, dense, and highly viscous consistency. Its high filler content ensures exceptional heat transfer
- LONG-TERM STABILITY: High cohesion prevents pump-out, dry-out, or bleeding even under repeated thermal cycles, ensuring long-lasting and consistent performance without the need for frequent reapplication
- PERFECT APPLICATION: MX-7 cannot be spread manually by design. Its low adhesion allows the paste to distribute naturally under cooler pressure, forming a thin bond line without trapping air bubbles
- SAFE FOR ALL DEVICES: MX-7 is electrically non-conductive and non-capacitive, making it completely safe for CPUs, GPUs, laptops, consoles, and other, no risk of short circuits or electrical discharge
- EFFORTLESS CLEANING WITH MX CLEANER: Removes old thermal paste thoroughly, preparing contact surfaces for optimal performance. Also available as a convenient bundle with MX-7
The Catalog shows several similar packages
Choose by exact Windows version, client versus Server edition, x64 versus ARM64, CPU coverage, release date, supersedence and whether the package is preview or production.
The package refuses to install
- Wrong Windows version or architecture.
- Unsupported CPU or package intended for Windows Server.
- Already installed or superseded package.
- Missing servicing prerequisite.
- Microcode already included in a cumulative update.
- Organizational policy blocking manual installation.
The revision does not change after reboot
- Check Windows Update history or the installed-update list.
- Run the registry query after a full restart.
- Confirm that the package covers the CPU’s CPUID.
- Check whether firmware already supplies the same or newer revision.
- Compare the exact field reported by your security or hardware utility.
- Rule out a virtual machine, where the guest normally cannot control host microcode.
Managed computers and virtual machines
Business systems should use WSUS, Configuration Manager, Intune or the organization’s approved workflow. A Windows guest normally cannot update the physical host CPU; update the host firmware, host operating system and hypervisor instead.
When a BIOS/UEFI update is still required
Windows microcode is not a complete substitute for platform firmware. A BIOS update can bundle CPU initialization, Intel microcode or AMD AGESA, memory-training, power-management, Intel Management Engine, PCIe compatibility, boot-chain, voltage or thermal-safeguard changes. Intel security advisories, including INTEL-SA-01396, commonly direct users to the latest manufacturer firmware.
This matters especially for Intel 13th- and 14th-generation desktop systems, where stability and voltage behavior may depend on BIOS settings and other platform components in addition to microcode. If the vendor advisory requires firmware, or Windows has no applicable package, use the OEM’s documented BIOS/UEFI procedure.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Windows-only versus firmware methods
| Method | Advantages | Limitations |
|---|---|---|
| Windows Update | Signed, automatic and safest no-flash route | May lag OEM firmware; coverage is CPU- and Windows-specific |
| Microsoft Update Catalog | Offline and manually deployable | Wrong-package selection is easy; applicability must match |
| BIOS/UEFI update | Loads earliest and can include broad platform fixes | Firmware-flash and recovery risks |
| OEM update utility | Usually identifies the correct platform package | Vendor-specific and may bundle additional changes |
| Third-party loader | May target unusual specialist cases | Trust, support, persistence and security concerns |
What happens after reboot—and on another operating system
A restart is required before a newly installed Windows package can be verified. The package does not permanently rewrite factory CPU state. Firmware microcode is available from the earliest platform initialization; OS-loaded microcode is applied during the Windows boot process. If you dual-boot, Linux, another Windows installation or a hypervisor may load its own package. Updating Windows does not update Linux microcode files, hypervisor policy or the BIOS.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
