Hidden files

Have a try of these steps and if they dont work do the next step.

http://technize.com/2007/05/13/show-hidden-files-and-folders-not-working/

Run a thorough check for hijackware.

Download HijackThis v2.0.2

http://aumha.org/downloads/hijackthis.exe is the preferred tool to use.

It will help you to both identify and remove any hijackware/spyware with
assistance from an expert. Don't try to fix anything just yet. Post your hijackthis log
to an appropriate forum.

http://forums.spywareinfo.com/lofiversion/index.php/
http://forums.spybot.info/forumdisplay.php?f=22
http://castlecops.com/forum67.html
http://forums.subratam.org/index.php?showforum=7
http://aumha.net/viewforum.php?f=30

Helpful Sites

Checking for Help with Hijackware
http://aumha.org/a/parasite.htm
http://aumha.org/a/quickfix.htm
http://aumha.net/viewtopic.php?t=5878
http://wiki.castlecops.com/Malware_R...:_Introduction
http://mvps.org/winhelp2002/unwanted.htm
http://inetexplorer.mvps.org/data/prevention.htm
http://inetexplorer.mvps.org/tshoot.html
http://www.mvps.org/sramesh2k/Malware_Defence.htm
http://defendingyourmachine2.blogspot.com/
http://www.elephantboycomputers.com/...moving_Malware