When the virused email opened

Question

when the virused email opened it not only put a virused spyware checker on it that hijacked the pc with hundreds of buy this product screens that totally disabled the keyboard it also stuck a fake screensaver i.e. bluescreen file : sysinternals - blphcv810ev8g.scr . it also took away my screensaver and background controls in desktop (deleted them). i have downloaded copies and can get screensaver to work in 2nd user screens but cant get screensavers to work in mine except as preview, but control tabs are working. i have removed all the rogue file and reg keys and run system restore, but the screensavers just wont go except on preview. all the blue screen error codes were different each time it showed. any suggestions please