I read about a new product today from a company I never heard about. They are called CitizenHawk. (http://www.citizenhawk.com/brand-protection.aspx) I have never used or tested their product so this blog is not any sort of endorsement. I am writing about them as they have some interesting promises that they make.
Smoke testing is a term used to describe the testing process for servers after patches are applied.
The process typically involves making sure servers are rebooted in the right order, making sure they have completely rebooted, restarting applications in the right order, and then testing to be certain everything is working properly when users return to work in the morning.
This typically takes 30 minutes per server, depending upon your environment.
PCs are not typically smoke tested, or if so, not all of them.