BTW Artex, a tip to keep performance degradation at bay and maintain those OCZ Vertex Turbos in good health onboard vintage comps.
No Windows previous to Se7en supports TRIM. And lack of TRIM is bad medicine in the long term for SSDs.
However there are applications that allow manually sending the TRIM command to the SSD, the OCZ one is OCZ Toolbox.

This application runs in Win XP SP3 (but not in anything previous), and can manually send the TRIM command directly to the SSD controller (even though XP doesn't support TRIM).
We should use this button from time to time to optimize the SSD, much like we defrag spinners from time to time (BTW we must NEVER EVER defrag a SSD, djudju).
'Ancient' OCZ Vertex Turbos may need a firmware upgrade beforehand, if I recall correctly early firmwares didn't support TRIM.