Microsoft released KB5075039 to fix a longstanding issue that prevented some users from accessing the Windows Recovery Environment (WinRE) after October 2025 updates. The update corrects the WinRE startup failure introduced by KB5068164 and requires a WinRE partition of at least 256MB to install, so users should back up data before resizing partitions. #WinRE #KB5075039
Keypoints
- KB5075039 fixes a WinRE startup failure affecting Windows 10 introduced by KB5068164.
- Microsoft previously patched a related Windows 11 WinRE input issue from KB5066835 in October 2025.
- Installing KB5075039 requires a WinRE partition of at least 256MB.
- Users must increase the WinRE partition size if it’s smaller, following Microsoft’s resizing instructions.
- Back up drive data before resizing any partitions to avoid potential data loss.