Client brings in a HP 27 omni all-in-one running Windows 7 home premium 64 bit.
Suddenly yesterday morning they wake up and their passwords don't work.
One standard id and one administrator.
Client brings over computer.
I assume it's just a file corruption problem.
I try to use a Dell Windows 7 64 bit disk to do a repair and run chkdsk.
But HP doesn't accept generic Win7 disks.
I use NT Password breaker to wipe out the password on the administrative id.
(This is lucky because if there is file/folder corruption NP password breaker might not work.)
I log on the administrative id and do a chkdsk /f from cmd prompt.
It runs the next time I reboot and now I'm able to use the password to get into the non-administrative id.
This confirms problem with file/folder corruption fixed by chkdsk.
Client comes over. We reset password on administrative id to original.
She takes computer home, plugs it in and is locked out of her userids again. She calls and I tell her I'll go over to her place tomorrow and fight with the problem.
I have no immediate explanation other than virus/malware. I'm afraid I'll get into some endless struggle that will take me forever to figure out and for which I can't possibly bill for time I put in. I have more than enough on my plate right now.
Do you have any rational explanation for this? Or way I should go about debugging the problem.