It is free for the first year.
In regards to:
Keep what you have... but purchase virtual pc 2004 to download whatever you are downloading into that. With virtual pc you can download your music, porn, freeware, testware, iso files, ect into that and delete it once you are done... your pc is protected.
Check out http://www.microsoft.com/windowsxp/s...s/default.mspx
If you are advanced and are comfortable partitioning your hard drive, you could do that. It discards all changes made to a computer upon restart. You can specify a section of the drive that remains the same (for like documents and whatnot) but all installs and changes get discarded. And when you want to make and save a change, you can flip a switch, make the change, and restart, then its locked again. Its really not for personal computer use more for Shared Access (like its really for), but in the event of testing things its nice to have, because you can test it, and restart and your computer is back to normal.