why computer need to deep freeze?

deep freaz is very good software just equivelent of any high quiality antivirus. because its protect the PC with any kind virus like. but only the specific drive it make. i m using deep freaz in my cyber cafe, lots people come and installe various software in system and also virus due too come with adult site & game sites, so i hav eto just restart my comuter system fresh like newly window this is the resons the mostly people use deep freaze.

Um...what is deep freeze? Is that like some kind of coolant or something?

first is, you need to protect our pc to any viruses...

deep freeze, like what everybody says, is a software that makes a back up of settings or "freezes" the settings at the state when it was installed. In a basic idea it is something like system restore but does it automatically every time the computers restarts. It restores your computer on the state before deep freeze was installed. Depending on what drive is affected by Deep Freeze, any settings that were changed would be restore to original, files that were downloaded would be deleted, and applications or software that were installed would be uninstalled automatically after a restart. It is a good alternative to anti virus since you do not have to worry about scanning and eveything because the virus would be gone just by restarting the pc and unlike anti-viruses which makes the internet and pc slower, Deep Freeze does not.