I have a windows xp machine that has had a problem with spyware.
I have installed microsoft antispyware, lavasoft ad-aware, & spybot search & destroy, of which none were able to locate this spyware.
The spyware has set itself up as a background html document, claiming that the user has spyware, "click here to remove it" sort of thing (how ironic). I have managed to locate and delete the html file (c:\windows\desktop.html), and make the appropriate changes in the registry, so now it does not show up; the user has a blank background.
Now this spyware had managed to disable right click on the desktop. I can right click on icons, just not on desktop 'space' to bring up display properties etc. So i managed to access the display properties throught control panel, but it has also locked me out from changing the background under the 'background' tab. I have been reading around, some have suggested gpedit.msc --> user configuration --> administrative templates --> control panel etc etc, i have tried setting this to disabled (was set to not configured), but this has not solved the problem.
And finally, everytime a desktop icon is created, it makes 2 icons. Delete one of those icons, they both dissaper. Huh????
I feel that these problems may be related, and further related to my spyware infection.