Hey all, thanks for the replies! I think this is resolved but I'll put the details in case it helps anyone else.
Sorry for the lack of info:
- 64 bit windows 8 (updated), 64 bit sonar (I also have 32 bit sonar installed but don't use it much) both X1d versions
- All programs installed to the SSD
- All audio/session files and soft synth libraries kept on the 1st STA drive (the other SATA is just storage)
- mem test passed
- no viruses and disks are clean. It's a pretty new machine
I did have a USB iLock in a USB 3 port but moved it to test (didn't help)
I removed an external USB 3 drive (didn't help)
Solving factor: I disabled Windows Defender and the problem seemed to disappear BUT only when I shut off the full program as administrator and set it to not start on boot up. In other words if I just stop the service the problem was intermittent. When it's fully stopped as a startup item the problem seems to go away. I can open multiple files etc. like the old days.
* I'd rather not use win defender anyways as I find running spybot, Hijackthis etc. seems to keep everything pretty clean.
I wonder if it's safe to assume that if I'm not browsing the web I could keep it turned off? What are the popular A/V apps for DAW machines?
Thanks again folks!
FD