Failed to update the system registry

Hello,Since we started using V8 we have experienced a problem with this - Failed to update the system registry- message box , we run a domain where only 2 people have administrative privileges, we found the knowledge base article covering the issue which basically suggest that we allow users administrator privileges, however, every time we allow this we start having problems with workers installing unauthorized software or installation of malicious software that we then have to spend hours fixing, so I would like to post the question to the forum as to how do you do to make both ends meet, that is, maintaining control over unauthorized software installation in the domain and allowing enough priviledges to be able to work?Best Regards,José