[jrebo]

You are running very common apps so I would suspect a registry tweak?

Does Task Manager show any app taking up too much CPU or memory? You could start removing apps, or tweaks one at a time to determine who is the problem child.

Worst case, hard reset. If you are having the issue, it's a hardware issue and I'd try to get a replacement. If it's running o.k. start adding apps or tweaks one at a time with enough time between to determine there's no problem.

Good Luck.