neo17

Please help ! with my computer?
OK so like I seriously need help with my pc. I want to fix it because It runs very slow, runs out of battery easily, & gets really hot really fast . I got a modification that personal anti-virus said I had a lot of viruses on it so I ran the process it told me but I didn't end up buying the software or whatever . I really wanna fix my computer by myself without my dad knowing and I'm a teen and I don't wanna spend any money cause I don't have a credit card and can't ask my dad/mom/sister . I really need help. how do I get rid of Personal Anti virus. it isn't removed by add/remove program.