I built this system when GST3 was new. It's an Athlon 2100+ processor with 1.5 GB of RAM and a RME DIGI 96 series soundcard. GST has run fine on this system, but I updated it to the last version of GST3 (Orchestra 3.04) and now it'll spontaneously reboot when just loading libraries. Anything even slightly taxing causes the system to reboot. This system is stable when not running GST3. I haven't run the diagnostics (I never found them particularly useful, but will if suggested). What can cause a Windoze system to spontaneously reboot? Should I go back to an earlier version of GST3? I could reinstall it, but then I'd probably have to reauthorize the software (not difficult but a PITA). I have Kompakt on the same system (EWQLSO Gold), but until recently they seemed to coexist OK. I know GST3 is now orphan software and I'd love to move to Kontakt, but that's not really an option at the moment.