Seems like you have a problem copying files around on your BigFix Server… Perhaps try to add an exclusion for the BigFix Server folder/temp folder for your anti-virus product and see if it helps.
That will occur if your server can’t launch one of the scripts that copies files around the system… This is rare but I have seen it before if your configuration files are very messed up or if something prevents a batch file from launching (like some sort of execution prevention mechanism or if cmd.exe is moved).
It would be best to contact support for a resolution.