system crash

Hey

I use your software frequently,i had this problem where after installing your software my system crashes and even the boot some time fails,i tried everything from changing my mother board to reinstalling my os etc... but when i tried installing ccleaner302.exe in my friends pc the same thing started to happened when i uninstalled it everything was ok...............

guys plz look into this i love your software

xavier

You are going to have to give a lot more info than 'your software crashes my pc'