Help please, This damn computer is broke!!! Options

[Desu]

I have a problem with my computer.I try many thing and it just getting worse.Here's the pronlem:

1.My computer is damn slow>Is there a way to fix that?
2.I cannot remove an antivirus called bit antivirus.I think this might be the one that make my computer since after I installed it the computer get very slow.I have tried the add/remove program but it didn't have any effect.
3.I cannot seem to aceees my e/ disk though I can access it by click on the link above (not the icon).Whenever I click it I get error message said access is denied.

Well that's the problem I having now.I hope somebody will know on how fix this problem.