Snow gone crazy - one issue a day

  • Hello there.
    I'm using Virus TI Snow for a couple of years or more with cubase 5 sequencer,win xp platform,4.5.3.00 os.
    After my last format,virus became very slow and had latency issues.Also,when i press the "save" or "load" button,nothing happens but the browser section does not work anymore.I tried to install some older (and newer,5.0.8.00 i managed to install it) os and the result is no latency at all,but a lot of crackling.Whatever patch i choose or just init patch,the sound is distorted .the SAME distorted sound no matter what parameters i change.With few words my snow doesn't work and i dont know what to do...PLAESE HELP,i have a project to be made in this week :/