Can't find drives in explore

Recently, my dell600 with XP pro won't show me any of my drives. It's set up as a multi user but I'm the only one and I am the administrator in users in control panel. When I go to Explore (or Explore All) no drives are shown in the window, no CD, no DVD and part of my wireless network places are missing. Any suggestions?

 

I believe there is a program you can download and it has the facility to reshow your drives. Not sure but I think it is called Tweakui and maybe it is one of microsoft's toys.
From here: http://windowsxp.mvps.org/tweakui.htm
Also here:
http://www.snapfiles.com/get/tweakuixp.html

PS when installed look under My Computer>Drives and place a tick in them all.

 

Per Microsoft's website, this behavior can occur if the Powertoys TweakUI tool is installed and configured to hide one or more of your drives.

http://support.microsoft.com/kb/191579

 

Thank you both very much.