Am new here, so please be gentle :)
I have a Windows XP Professional computer that's run just fine since 2003. Recently, it got hit with a truly strange symptom - the system will "lose focus" (stop responding to ANY keyboard/mouse input until Task Manager is run, and a item in Task Manager is clicked on. Then, the system will "regain focus" and respond for a bit - tonly to have the symptom repeat.
I run the latest version of Kaspersky Internet Security 2009, fully updated - and it's detected nothing. On visual insptection, my system had a funkily-namede .sys file iunthe Windows directory that didn't seem to be being used by anything. So, wanting to be safe and sure, I reformatted the system drive completely using a Full format, and reinstalled Windows XP from my original disk. Here's the weird thing: The symptom survived the reformat. Right now, my system is in the process of being restored, and only has Total Commander, Firefox, Thunderbird, and Kaspersky installed from fresh downloads - and not only this symptom has persisted, the Windows desktop is now locked as well - as In I cannot reposition icons, use drag and drop from the desktop, OR add to/ rearrange ANYTHIGN in the Quick Launch area. The taskbar is NOT locked, and the system thinks it is. This is on a FRESH, CLEAN install, mind you.
Any advice would be appreciated, it's the strangest thing I've ever seen.