Hi. I'd be really grateful for some help! Since 22/6 my pc hasn't booted into Windows (XP, SP3): the Windows startup window appears for about 30s, then screen goes dark & all hdd activity seems to stop. (But monitor stays on, without the expected No video signal message or whatever). CTRL-ALT-DEL does nothing, so I have to press the reset button. I can boot into safe mode, but I don't have networking/online access even if I choose safe mode with networking. (Poss because I use a usb wifi adaptor?). Booting into last known good configuration doesn't have any effect, nor does System Restore (2 restore points tried). I don't remember anything untoward happening on 21/6. I've posted on the Virus & Malware forum, but I've been told that nothing looks suspicious. Any ideas please?