On a Dell PC (Windows 7 Ultimate 64bit), I had a hard drive failure. I bought an identical size (1 TB) hard drive, restored a backup drive image (Norton Ghost) and successfully booted the PC (after running Windows DVD to repair bootrec.)
Everything is working fine EXCEPT that every day now I get "Not Running Genuine Windows" with 0x8004FE21 error message and of course can't run Windows update...
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