anyways it has something like the USB/VSTI thing that the virus TI and nowadays a lot of hardware has USB MIDI and even audio. and once you have a few, especially with scope, timing problems or even crshes can occur.
* Origin Connection is fully compatible with Windows XP SP3. It is also compatible with Windows XP SP2 on monocore computer (without hyperthreading). Unfortunately, it encounters some troubles with SP2 dual-core or hyperthreading computers. This issue is due to a problem in Windows XP USB-midi driver. If you encounter this issue, the best way is to install windows XP SP3. *
I have upgraded the machine i use with cubase and Virus TI to Sp3, (quad core xeon 3210 on some cheap asus mATX-EMU 1212) and i have had very few problems with it (however there was new virus firmware/driver around the same time) i am actually using the VSTi virus control thing in real time and its really fun. and i am beginning to hate USB quite a bit less

next thing is to put SP3 on the scope machine (E8400 on Supermicro C2SBE - 36 DSP of scope) and see how it gos.
Btw anyone scared of SP3 installing some new WGA or DRM rubbish, it does not, it will offer it to you in a windows update later. I would reccomend downloading the network admins install rather than using the windows update one. then you only need to get it once for all machines, and you can burn it incase you need to reinstsall
also if you get a "permission denied" error when installing SP3, there is a workaround.(pretty obscure it happened on my main machine believe because i use ciscoVPN to get on my works network)