Medium
Operating Systems
✓ Solution Verified by Community (1+ upvotes)
How to fix error 0xc1900101 in Windows 11
Upload the setup log files C:\$WINDOWS.~BT\Sources\Panther\setupact.log and C:\$WINDOWS.~BT\Sources\Rollback\setupact.log to OneDrive or GoFile.io and post the link. Open Windows Security. Community-verified fix with 1+ upvotes.
Fix based on community reports and expert analysis. Last verified: 2026-08-12
· How we verify fixes
| Error Code | 0xc1900101 |
|---|---|
| Affected System | Windows 11 (Microsoft) |
| Difficulty | Medium |
| Estimated Time | 15 min |
Solution Steps
- 1 Upload the setup log files C:\$WINDOWS.~BT\Sources\Panther\setupact.log and C:\$WINDOWS.~BT\Sources\Rollback\setupact.log to OneDrive or GoFile.io and post the link.
- 2 Open Windows Security.
- 3 Navigate to Device security.
- 4 Click Core isolation details.
- 5 Enable Memory integrity.
- 6 If incompatible drivers are listed, post a screenshot.
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