k , last week i got a few trojans which only appeared after updating windows, i managed to clean all my pc of infection ,BUT now it takes the piddle shutting down it used take 20seconds now its like 5 mins or more.i cant do fresh install or repair becus i have very slow connection and would take days to complete. also there is like 40gb missing after everything is accounted for any ideas? that vss service is turned off

My Computer
System One
-
- CPU
- amd turion 64 x2 tl-60
- Memory
- ddr-800
- Graphics card(s)
- nvidia 9300m G
- Sound Card
- Realtek HD audio
- Screen Resolution
- 1280x 800