All screwed up

Hi guys, I picked up a virus a few weeks back it took some doing but i got rid of it. But my pc doesnt run so well now, i tried fixing it with Yamicsoft Windows 7 Manager. It did repair a lot of issues but created a lot also. Now it seems like i am running Vista again it is slow and a lot of features are gone. My question is, can i just reinstall w7 over top of the existing without losing anything. I did clone my HD but since i cloned it i have a lot more data that i would lose. I guess what i am asking is is there any way to repair the os without reformatting???????????

You can try a repair install from the Windows DVD :)

How do i do that?

There is a hyper-link in my earlier post... just click it...

Thanks i will try

I have all the updates installed so it will not let me do a repair

I have tried to do a system restore and it will not do it

I would opt for the "clean" install also.