Before you begin
Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.
Work through these checks
0 of 3 complete01Disconnect from any active VPN client or proxy server and try running the update again.
- Disconnect from any active VPN client or proxy server and try running the update again.
What to expect
Check whether the original symptom still occurs.
If it does not helpContinue only if this check applies to your device. Consult its manufacturer if you are unsure.
02Verify Secure Boot is enabled in your BIOS/UEFI settings to allow system update validation.
- Verify Secure Boot is enabled in your BIOS/UEFI settings to allow system update validation.
What to expect
Check whether the original symptom still occurs.
If it does not helpContinue only if this check applies to your device. Consult its manufacturer if you are unsure.
03Extend or clean up the EFI System Reserved Partition (ESP) to ensure at least 15MB of free space.
- Extend or clean up the EFI System Reserved Partition (ESP) to ensure at least 15MB of free space.
What to expect
Check whether the original symptom still occurs.
If it does not helpContinue only if this check applies to your device. Consult its manufacturer if you are unsure.
Possible causes
- The EFI System Partition (ESP) has run out of allocated space for boot configuration files.
- Secure Boot is disabled or configured incorrectly in the UEFI motherboard settings.
- An active VPN connection or proxy is blocking communication with Microsoft Update servers.
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