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Use bcdedit /timeout to set how many seconds Windows Boot Manager waits, and bcdedit /default to choose which boot entry it selects when that wait ends. The options work together: one controls the delay; the other controls the destination.
What these BCDEdit options change
BCDEdit is a built-in Windows command-line tool for managing the Boot Configuration Data (BCD) store, which describes boot applications and their settings. Microsoft requires administrative privileges to modify the store. See Microsoft’s bcdedit command reference.
| Option | Value supplied | Effect |
|---|---|---|
/timeout |
Number of seconds | Sets how long Boot Manager waits before selecting the default entry. |
/default |
Boot-entry identifier | Sets which entry Boot Manager selects when the timeout expires. |
These are complementary settings, not alternatives. Microsoft documents their syntax and behavior in its /timeout and /default references.
Before changing the boot configuration
- Open Command Prompt as an administrator. BCDEdit changes require elevated privileges.
- Inspect the entries on this PC by running
bcdedit /enum. Identify the entry you intend to use rather than copying a GUID from an example. Microsoft explains identifiers in Boot Options Identifiers. - Distinguish
{current}, the operating system entry currently running, from{default}, the boot manager’s default application entry. Those identifiers can refer to different concepts; consult Microsoft’s guidance on changing the default boot entry.
Set how long the boot menu waits with /timeout
Command
Run bcdedit /timeout <seconds>, replacing <seconds> with the desired wait duration. For example, bcdedit /timeout 30 sets the wait to 30 seconds, as shown in Microsoft’s /timeout documentation.
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Choose a useful interval
A shorter interval gets past the menu sooner; a longer interval gives you more time to select another listed entry. Microsoft’s boot-options editing guidance describes shortening the wait for quicker test cycles or lengthening it when more time is needed to choose an entry.
Choose the automatic boot entry with /default
Command
Run bcdedit /default <ID>, replacing <ID> with the identifier for the entry you want Boot Manager to select when the timeout expires. First inspect the local entries with bcdedit /enum; identifiers vary by system. Microsoft’s example uses a GUID in braces, but that example is not a universal ID for your PC. See the /default command reference and identifier list.
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Check the identifier before running the command
Use the ID that corresponds to the intended boot entry in your own listing. In particular, do not assume {current} and {default} mean the same thing: the former identifies the currently running operating system entry, while the latter identifies the boot manager’s default application entry.
Apply changes and account for safeguards
- After modifying BCD, perform a normal shutdown and reboot so the changes are flushed to disk, as stated in Microsoft’s BCDEdit command reference.
- BitLocker may need to be suspended, and Secure Boot may need to be disabled, before setting some BCDEdit options. This depends on the system and option; do not turn either off automatically. Check Microsoft’s boot-options editing guidance for the applicable context.
- Microsoft warns specifically that “Changing some boot entry options by using the BCDEdit /set command could make your computer inoperable.” That caution is about
/set; it is not a claim that/timeoutor/defaultalways cause that outcome. Review Microsoft’s BCDEdit safety guidance before making broader boot-entry changes.
If you would rather not edit boot configuration from the command line, Microsoft’s boot-options editing guidance points to System Configuration (MSConfig) as an alternative for changing boot settings.
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