Running WinXP Professional. I get a background but no desktop icons, no taskbar, can't start the Control Panel, etc. I can only run programs from the Task Manager. When I run explorer, it attempts to start (I see it flash on the screen then it's gone). If I monitor the Task Manager processes explorer is there for a brief second, the terminates. Ditto for programs like Control.exe. I've tried sfc /scannow, updated IE to version 7, did an XP Professional repair and a couple of other things. Any suggestions?