I have been using installforge for my application and some users have been reporting this error when they try to run the installer.

I have checked the MD5 hash of the setup file on the users that are effected and the hashes match so it doesn't look like the installer has been corrupted by any anti virus software.
Also to note the installer is working fine on the majority of our users however 4 or 5 users are having this issue.
Would greatly appreciate any help on this problem.