rhedzki27, I personally haven't tested that particular or any other Vista SP2, as yet, but thanks for the reference I was looking for Vista SP2 Ultimate. Anyway back to u, when u are asked for the serial/key leave it BLANK and continue as normal. If it doesn't let u continue then google for a list of valid serial/keys or keygen for that version of Vista (this method is almost guaranteed NOT to work, just MY opinion.) This should allow u to continue with the installation of the OS (Vista) after IF it does AND doesn't encounter any problems then u SHOULD get to use Vista for 30 DAYS without a serial/key as compared to an INVALID serial/key which gives u ONLY 3 days of use. This is now your decision 30 days VS 3 days. At the end of the trial (when the days are up) the OS (Vista) locks u out of your computer and only asks u for a VALID serial/key. I can't tell you how to activate it after installation but look (google) for a crack or patch for windows genuine validation for Vista. I am currently using an official Vista SP1 Ultimate (pre-activated, It is already ACTIVATED immediately after it installs) so I can't really help u any further than this.