We were not trying to fix infected systems. We were trying to delete infected attachments from email messages. Groupshield was able to detect that an attachment was infected, but it would not DELETE it. No fixing, no patching, no infection, no DELETING. Even the NAI technician that we always deal with was confused as to why it was released because it didn't function as advertised and was obviously not tested. I totally understand that it takes more time to fix an infected system than to identify an infected file.
I guess the time to release a fix could be a major factor. I have found that same problem many times over the years, even with other products. I guess in reality it would take a few hours to figure out how it works, figure out how to clean it without breaking windows and then testing it for another few hours. Many of the fix actions require repairing key windows components and editing the registry. I always look around everytime a contract comes up, but my solution is so customized and layered that it would take some major shift to get me to spent weeks redesigning the whole thing. You may find with other products you will run into a delay while waiting for a fix.