Can't delete virus file with Revolution

[Wilhelm Sanke]

The virus scanner "Spyware Sweeper" found a "NMap Win 1.2.12" virus on 
one of my computers at

"C:\WINDOWS\Installer\{CC550492-0747-48E4-A37C-5A2A0C815489}\NewShortcut1.exe",

but fails to quarantine or delete it, i.e. it performs the operations of 
quarantining and deleting on that file, but next time when you do a 
virus sweep the file is there again. This could be probably a deficiency 
of "Spyware Sweeper", because I got other problems with that program, too.

Another virus scanner, "Spy Sweeper" by Webroot, however does not flag 
this file as a virus.

"C:\WINDOWS\Installer" is a "hidden folder" that is not displayed when I 
try to access it with Windows, but I can access it using Revolution and 
also list the subfolders - among them 
"{CC550492-0747-48E4-A37C-5A2A0C815489}", which contains the 
"NewShortcut1.exe" file.

There are more "NewShortcut" files in the subdirectory with different 
numbers including a RTF file, which however produces garbage when I try 
to put it into a field using

"put URL  
"file:C:/WINDOWS/Installer/{CC550492-0747-48E4-A37C-5A2A0C815489}/NewShortcut26.rtf" 
into fld 1"
or
"set the rtftext of fld 1 to URL  
"file:C:/WINDOWS/Installer/{CC550492-0747-48E4-A37C-5A2A0C815489}/NewShortcut26.rtf".

Replacing "file" with "binfile" does not help either, there is only 
garbage in the field.

Now, trying to delete the virus file using
"delete URL  
"file:C:/WINDOWS/Installer/{CC550492-0747-48E4-A37C-5A2A0C815489}/NewShortcut1.exe"

produces an error message "can' delete that file" - probably because the 
file's cantdelete property or the equivalent for Windows is apparently 
set to true.

How could I change this cantdelete property of the virus in Revolution 
to be able to finally delete it?
Any help is appreciated.

Best regards,

Wilhelm Sanke
<http://www.sanke.org/MetaMedia>