ITunes issue -->
Open up Itunes, and what you have to do is go to Edit, Preferences, Import/Export I think. there's an option there, and it says to export to a format. Change it to mp3.
Basically highlight all of your songs, and export them to MP3. That will allow you to copy them whever you want.
I also set my Itunes up where everything is saved in a folder on a spare drive (So D:\Music) and I have it sorted by Artist, Album, etc. I just have to copy that whole Music folder. You can google on how to do that.
Vista Issues -->
It sounds like you didn't install it right. I've done a few hundred Vista/W7 installs. You have to select Advanced Install during the setup, and then DELETE all the partitions that come up. That is the only way to get all the space back and do a single install.
You can also google this.
As far as the virus and mouse/monitor not working - that doesn't sound like a virus. Sounds like a motherboard issue.
As far as restoring to a previous date - that won't fix your duplicate vista install issues. That has nothing to do with the OS, its saved on seperate sectors of the HD.
If you have no idea what you are doing, take it to the Geek Squad and just pay the money. Maybe if you flash some boob you can talk one of them into writing down/explaining how to do the process yourself
Even a ghost needs to breathe.