While on the internet, a program was downloaded onto my computer that is now covering up my windows background.  I have tried everything I can think of to get rid of it, but to no avail.  When I right click and click on properties, it lists none.  Is there a way to remove this off my computer so my real background shows up again?

Thanx,

i-dVIRUS scanners
AVG Free
-- Anti virus scanner
Trend Micro Housecall
-- Online anti virus scanner.

Anti spy/malware
Microsoft Antispyware
-- Anti spyware scanner. Windows XP Home and Professional only.
Spybot Search & Destroy
-- Anti spyware scanner
Adaware SE Personal
-- Anti spyware scanner

Firewalls
Use both a hardware and software FIREWALL.
Be advised as dual software firewalls may cause problems

ZoneAlarm Free
-- Free firewall - more user friendly
Sygate Personal
-- Free firewall - more configuration options

Removal tools
The following files are not substitutes for the ones described above.
They are either diagnostic tools or removal tools for malware of a certain kind

HijackThis
-- Manual malware remover. Post the HijackThis log generated only if requested!
McAfee Stinger
-- Virus removal tool. No substitute for a fully functional virus scanner!
CWshredder
-- CoolWebSearch removal tool. Widely known and persistant Hijacker.Can you post a screen shot please?I tried the virus scans.  Same as when I used Spy-Bot before.  No RESULT.  

I tried to copy a a screen shot, but unable to do it.  Does not give me the option to do so.  It is just a blank white screen, over the background, but my icons are visible over the white.

Whenever I TRY to delete or check for properties, comes up with nothing.  It is as though there is nothing to grab onto.  Is there anything in Add-Remove programs which shouldn't be there, or in your msconfig startup?I do not see anything unusual in Add-Remove programs.  Not sure what to look for in msconfig startup.You need to use more than ONE program.

Creating a screenshot can be done using the print screen button.Did you try a restore to a previous date?Sometimes simple themes cover your desktop.

Rebooting takes care of these.