is there a good web site to get computer diagnostic tools (hardware; software not an issue)? Im looking for voltometers, etc.

I was told not to install a registry cleaners if your not experience, which Im not. so how to make it easy and safe for me to clean and spead up my puter ? thaks sas

Yeah, its asks about my realteck audio software and i know that i want to say yes as it was on my pc before, but theres no way to move the cursor and i have tried moving un plugging the mouse and keyboard but this doesnt work.