I'm working with Broni on a problem (see “Windows XP - slow performance and _helper.sig pop-up on start-up” thread). After posting OTL Run Fix and Quick Scan logs in that thread this morning, I rebooted the computer and left for work. My wife woke up and used the computer a little (e-mail). Then she came in the room and saw what she termed the White Screen of Death. - Ctrl-Alt-Delete had no effect - Pressing and holding the power button on the CPU had no effect - She unplugged the computer; waited 20-30 seconds and plugged it back in. Upon pushing the power button on the CPU, the white screen reappeared. No opening screens came up, just a white screen. As always, any help is much appreciated. Thanks.