dll install issue

I have had no issues for past releases of my software but my latest release have had reports from users about error 713 wrt installed .dll files (all users are on XP). I haven't seen the issue on my own test systems but when I enquired about details they report seeing .$$x (x = uppercase letter) extensions in their system folder instead of the proper .dll extension. Is this a tempfile naming convention used by icp? Any suggestions? My file options for the .dll in question are ...su.o...h.

Apparently there is a virus on their system that is being dealt with by their IT people.

Yes .$$x files are temporary files. When IC installs a file that already exists, it creates a .$$x file and then if everything is OK it removes the original file and renames the temp file. If the file can't be replaced, for example when it's in use by an application, it will be replaced at the next restart of Windows (the installer displays a "you need to restart Windows" message at the end).

"Error 713" - is this error message displayed by your installer?

Sorry for the late response. The inability to install the dll was a byproduct of a battle with the conficker virus by my client's IT dept. They had disabled their systems from installing dlls without telling anyone.

Oops... [crazy] Thanks for the info.