1. Run a command prompt (cmd) as administrator.
2. Type lodctr /r
3. Wait a few seconds for it to throw ERROR: UNABLE TO REBUILD PERFORMANCE COUNTER SETTING FROM SYSTEM BACKUP STORE. ERROR CODE IS 2
4. Type again lodctr /r. This time it should run successfully.
5. Run Windows Update and try the install patch that was causing you problems again or manually try to run the update again.