If these are recent developments on your current setup, it sounds more to be a PC optimization issue than a DF issue. Installed anything lately? Using a new wireless, laser, 9 button mouse? Got some new bot-ware from that midget porn site you tell people you don't go to, ever, no way, not me!?
When a previously stable process begins to act un-stable, something has changed. If it's not DF (or an add on) then start looking elsewhere.