This started happening a few days ago, can't seem to pinpoint a pattern though. At random times I'm unable to access anything except my browser - file explorer, control panel, etc etc will not open. I can open programs (Sonar, Word etc), but getting anything else to open requires a restart, which hangs for 4-5 minutes. Didn't happen yesterday, but just happened about 10 minutes ago.
The only thing I've changed recently is to add a 16gb USB3 stick for back-ups.
Anyone else had this?