I have made these assertions on this forum before but I'll make them again for those who may be new to the scene.
Disclaimer: I'm a narcissistic IT/Software Development Genius with sociopathic ego problems.
* If your system is constantly crashing you need to do one or more of the following: Stop buying cheap crap. Fire your IT person. Get an IT person. Train employees to stop going to download.com and downloading everything they can find.
* Your antivirus should be up-to-date. Always.
* Your computers should be properly patched and updated. If you are still using Internet Explorer 6 on Windows XP, you should either fire your IT person or get an IT person.
* See my post on what causes the most problems with AC running properly. It can be
found here. JamesNT