next day, i turned on the laptop, found that my desktop photo had been changed to a blue screen, and the hidden files in My Computer could all be seen. so did an MBAM full scan, which uncovered two worms named 'norton' or something. i removed those two and restarted, then did an MBAM quick scan, which found nothing. i also change my desktop photo to the original and kept the hidden files hidden.
turned on the computer a few times and it was fine. i used CCleaner to clear my cache, etc, then after i had closed the programme, desktop photo had been changed to a blue screen, and the hidden files in My Computer could all be seen. so i changed them back.
when i turned on my laptop just now, my desktop photo had been changed to a blue screen, and the hidden files in My Computer could all be seen again.
(meanwhile, my trendmicro officescan real time monitor keeps telling me it has found virus/malware, but doesn't give me a window in which to remove them, so not sure if they are removed.)
not sure if this indicates an underlying problem, please help!
/edit 10.34pm i just did another MBAM full scan which says it found nothing...
/edit 11.12pm my trendmicro scan informed me it has quarantined two trojans. when i looked at the desktop, it was a blue screen again!
/edit 21 mar when my computer was booting up the usual desktop photo appeared, then suddenly this little black window from trendmicro called 'tsc.exe' appeared, then the desktop went blue again, and hidden files became unhidden. googled tsc.exe, some sites say it's harmless and important part of trendmicro, but this site has a page on how to remove it... HELP!
Edited by junzi, 21 March 2010 - 02:28 AM.