I was trying to upgrade windows 10 to 11 preview build by windows update and then while installing update(after restarting), my system displays 'undoing changes made to your system...' and after awhile it reverts back to windows 10 itself. After that going to system updates, I get error code: 0xc1900101. My system meets the system requirements and TPM(2.0) is enabled.
Processor: Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz 1.99 GHz
RAM: 16.0 GB (15.9 GB usable)
System type: 6.0 GB (15.9 GB usable)
Happy to provide more info. Thanks :D
0xc1900101is not unique to Windows 11, there are many reasons, you would get that error. – Ramhound Jul 01 '21 at 08:09