Last month I was asked to speed up a slow Microsoft Windows 11 computer. The owner felt something was infecting it and his resident security software missed it. One of the procedures I like to use is scanning for malware when Windows is dormant. This is done with a Linux-based CD or USB drive with a virus scanner on it. On this computer I discovered the hard drive was encrypted with bit-locker. It wouldn’t let me access it to scan because I didn’t have the key and neither did the owner.
So I had to do things differently within Windows 11. I downloaded another virus-scanner and scanned it and found nothing dangerous. If you use bit-locker on a hard drive make sure you save the key for the encryption or you may be locked out of it.