How To Install Windows 7 Service Pack 1

I hope this prevents a major headache for you. Thanks for watching.
LINKS-

https://msdn.microsoft.com/en-us/library/windows/hardware/ff550423%28v=vs.85%29.aspx

https://support.microsoft.com/en-us/gp/windows-update-issues/en-us

http://bit.ly/1S5TzZN

Good luck!

source

how to repair windows 7