Just for clarification, is KB976932 the Service Pack 1 for Windows 7? And is KB2653956 the security update pertaining to Remote Code Execution (April 10, 2012)? If yes, the first thing I'd do is run a full anti-malware scan using the free Malwarebytes
. If the scan comes back clean I'd run Disk Cleanup to remove any unnecessary "junk" on your rcomputer. Disk Cleanup - Open and Use
Then I'd run a System File Checker scan from an elevated command prompt (option two, this tutorial.) If any problems are found run the scan 3 times rebooting in between each scan. Damaged or corrupt system files can keep updates from installing. SFC /SCANNOW Command - System File Checker
If SFC doesn't show any problems I'd try to install SP1 by itself. Learn how to install Windows 7 Service Pack 1 (SP1)
Please post back with the results.