Corrupted Desktop Icons

[Microsoft]

Today I the icons on the desktop that represent shortcuts have all suddenly
changed so that the icon seems to be behind what I think is the Vista
default for a link to a non-existent program
All the shortcuts are still working and if I try to change it to the
(correct) icon shown in properties nothing changes.

Can anyone advise me what I might have done to cause this or, more
importantly, advise me what I need to do to correct it.?

I spent several hours searching the net for a solution but so far I've found
nothing.
I've also restore my system to a point 4 days before this fault occurred but
it has made no difference

Any help will be much appreciated

 

[Chorks]

Thanks, that did the trick.

I looked at the current entry in the registry and it was pointing at
c:\windows\system32\oobe\info\blank.ico
The info subfolder didn't exist

Thanks again