My trusty XP PC has a developing problem where, every hour or so, the machine freezes solid. During this time, everything is locked, less for the mouse cursor, and the hard disk light is on. Evidently something is accessing the disk, as the disk light eventually flickers and the machine recovers. Usually, there is a temporary recovery half way through, then the disk kicks into life and off it goes again. The "freeze" is getting longer - now it covers a period of up two minutes, with a temporary unfreeze in the middle. I thought it was Firefox locking up over Flash images, but it seems to occur during any application, and with only one application running - eg Outlook or Excel. I've de-fragged the registry, malware'd/virus'd/etc, defragged the disk, cleaned up, etc, etc. Can't find whats causing it. I suspect its some shite Microsoft service thats been activated after an update. Problem is, even Task Manager is frozen or unable to launch during the freeze. When the PC un-freezes, Task manager of course doesn't reveal whatever has just switched off or ceased using the system resources. Q: is there a tool of some sort that can track & record such an event? Better still, a tool that can prevent a service from jamming up the system?