Error WINDOWS 7 7601 BUILD NOT GENUINE. No idea how to fix this.

I would tend to suspect possibly a disk problem - bad clusters or worse....


Please run a full CHKDSK and SFC scan....

Click on Start > All Programs > Accessories
Right-click on the Command Prompt entry
Select Run as Administrator and accept the UAC prompt - the Elevated Command Prompt window should pop up.

At the Command prompt, type

CHKDSK C: /R

and hit the Enter key.
You will be told that the drive is locked,
and the CHKDSK will run at he next boot - hit the Y key, press Enter, and then reboot.

The CHKDSK will take a few hours depending on the size of the drive, so be patient!

After the CHKDSK has run, Windows should boot normally (possibly after a second auto-reboot) -
then run the SFC.

SFC -System File Checker - Instructions
Click on Start > All Programs > Accessories
Right-click on the Command Prompt entry
Select Run as Administrator and accept the UAC prompt - the Elevated Command Prompt window should pop up.

At the Command prompt, type

SFC /SCANNOW

and hit the Enter key

Wait for the scan to finish - make a note of any error messages - and then reboot.


Copy the CBS.log file created (C:\Windows\Logs\CBS\CBS.log) to your desktop (you can't manipulate it directly) and then compress the copy and attach it to your reply

None of the fixes applied here would affect either data or installed programs.
I would suggest backing up to external storage before running the CHKDSK.

...see the Windows Update Posting Instructions for how to post the CBS.log file

Disk corruption or malware.

I'd back up first - there's always a possibility that if the disk is failing, a full CHKDSK could be the straw that breaks its back.