You know, I'm in the minority on this but I've always been of the opinion that if there's one piece of software it's worth spending money on, it's the Anti Virus app. I realize there are some good free options (Avira, Avast, etc), but as far as I'm concerned I want the BEST - and that's never free.
BTW, there are ways to get to the recovery console without purchasing an XP CD. You can either borrow an XP CD (any version will work and it's perfectly legal) or you can do this:Create Recovery Console CD using ARCDC:
Please download ARCDC from http://artellos.com/arcdc-page
1) Double click ARCDC.exe
2) Follow the dialog until you see 6 options. Please pick: Windows Professional SP2 & SP3
4) You will see a few dos screens flash by, this is normal.
5) Next you will be able to choose to add extra files. Select the Default Files.
6) The last window will allow you to burn the disk using BurnCDCC
Your ISO is located on your desktop.