Forum Discussion
Windows 11 Insider Preview Feature Update (26220.8754) Install error - 0xc1900101
Hey. I tried multiple times to install this update and it always fails after I restart
Hi, 0xC1900101 is usually driver-related during a Windows feature update, even when Device Manager looks clean.
I would try this order:
1. Unplug nonessential USB devices and docks.
2. Update BIOS/UEFI, chipset, storage, graphics, Wi-Fi, and Bluetooth drivers from the PC maker's site.
3. Temporarily remove third-party antivirus, VPN, disk encryption tools, or tuning utilities.
4. Make sure there is plenty of free disk space.
5. Check C:\$WINDOWS.~BT\Sources\Panther\setuperr.log and setupact.log after the failed attempt.
If the same build fails repeatedly, Feedback Hub plus those setup logs will be the most useful next step.