hi followers , first update your system , by using microsoft update website and then reboot once .
if your OS is xp means , install SP3 , and if vista means , install SP1
solutions
1. try MICROSOFT FIX IT by using this link , its fully free
http://fixitcenter.support.microsoft.com/Portal/ and then installadn use your hotmail emailand password. i hope this method solve your most problems.
2. above method not working means , uninstall MACAFEE and the try install KASPERSKY INTERNET SECURITY 2012 from this link
http://www.kaspersky.com/kis-trial-register enter email address and then start download. iam using this for two years i not getting any problems .
wish you all the best friends