Need help about my system speed and other problems

[Arshad Niazi]

Salam to all my friends
Dear I m sending you all screen short I want to know why speed of my system is slow when no anti virus is also install and I use net also.

2nd thing I want to know when I m using Mozilla for fox
Then I also need to install down load manager or not.

3rd I have made a folder in which I keep all my important s_w etc. most of then got corrupt.
Plz tell me in detail what should I do I install
Fresh windows many time delete all partition
Changed 3 to 4 cd also but probleum is still there .
So please help me to solve my this issue.
I m waiting for your quick and kind reply thanks to All in advance.