Two things sprung to mind.
1. Have you turned off User Account Control? This conflicts with a lot of things including third party anti virus
2. Have you tried doing what you want to do in the actual Administrator account? Not the account you usually log in with that has standard administrator rights.
You will probably find that the original Administrator Account has been de-activated (is not one of the options to choose form when you log in) It's a simple process to activate it via the command prompt and may narrow your problem down a bit.
If no luck, you can de-activate it again and be back where you started in a minute.
3. Have a check in Kaspersky to see if it is blocking anything relating to what you want to do.