maybe this will help maybe not...
i use ccleaner for my laptop...its very simply to use and its FREE!! gets rid of all the old crap...and checks the reg aswell..and if theres crap there it sorts it out....(when using the reg checker B4 you delete files..always make sure you have saved the back up file as prompted)...like i say i use this once a week including the reg checker and dont have any problems...also i do check for updates every 2/3 weeks for java..and flash player...their worth doin also....site link as follows...
www.cnet.comin search bar type ccleaner and down load...handy bit of kit...hope this helps in some way...
anton
ps just a quick note when it cleanes files it cleanes all passwords and log in details...so make sure u keep them...