If you don't know what exactly to undo in the registry, the only things you can try are:
1. system restore back to before your 'friend' hacked your computer
And if that doesn't help:
2. a nice clean install of the
3. not uninstall Kaspersky antivirus (it's a good one) and keep using it
I am using visra ultimate.cant uninstall kaspersky bcoz of crack my friend downloaded that made hanges in registry.may d ugliest *** **** him.i tried registry cleaner,ashampoo winoptimizer,registry mechanic,nothing worked.will never allow ppl 2 use cracks again.plz help on this one.