Answers to recent posts: "Surely as with all new precautions to stop spyware/adware the programmers will just find ways to search for other windows installations on other drives etc to copy the viruses etc over?"
Programs cannot infect others if they are not run. When booting from another partition, you are not running the infected stuff. Infection is an apt word because anything that seeks out and instals to other partitions without your consent is a virus, classified as a federal crime - not so common. I've never seen an 'adware' or 'spyware' or 'mailware' that does this 'seek and destroy' stuff, but if it does, just restore from a backup partition on another drive - offline drive. You do keep a drive or two off the machine altogether yes? What if your stuff gets hit by lightning! =:-o
As for I-Tunes, this has nothing to do with that.
As for the 'domain controler' comment, again we are not talking about viruses. Viruses are illegal, and there are programs like 'Norton Antivirus Corporate' that do a good job of cleaning those out. I once had 'pinfi' all over the place! ;( Norton got me squeaky clean

I've had a few worms, a few bugs - no biggie. I would say (and I am sure most agree) that spamware and adware are FAR more intrussive and DESTRUCTIVE than any virus - save those that erase AND OVERWRITE files (even if it deletes files, you can get them back with a program like 'restoration' quickly and easily).
I think we should focus on activism to make adware and mailware and spyware ILLEGAL - a federal crime - to reduce it. Email your representatives in government. I have!
You do not need swappable drives to do any of the stuff I mention. Personally I have 16 drives on a single server. I have 4 bootable partitions, and 4 backups of them. Everything is on one machine and it is always on. Whenever there is a 'problem' I simply boot from another partition and overwrite the problem partition's 'winblows' files - problem solved. It really is that easy.
Nothing I talk about requires opening a case or swapping any sort of cable inside or out. As for hard drive failure, it is not common at all IF drives are kept cool! The only time I've had drives fail is when they get hot. 'Micrapolis' MAY be an exception (I hear those went bad even if kept cool). When I say cool, I mean you should touch it and it doesn't even feel warmer than room temperature. It should NEVER feel 'hot' to the touch. It does not make them fail straight away when hot - in fact many 'claim' high operating temperature lifespan, but it is in real-world-applications much shorter when allowed to get warm (it makes the components on the controler boards fall out of their ratings typically, with the dreaded 'click click click'. If you have a hard drive 'failure' typically it is just the board. Get another drive of the same model, and swap the controler boards on them - and you are up and running
The comment about booting from CD to go online is overcomplicated. You can run the same machine for everything (offline and on). I do and what I say always works. It is always on, always running, and 'cleanup' is always easy (follwoing the simple 'overwrite the winblows with fresh' and 'scan with NAV once in a while' method. All this other stuff I say is in answer to your 'glass half empty' responses.
You do not need to purchase 'deep freeze', but I WOULD suggest getting a hold of NAV corporate

The topic here is not viruses though, but adware and mailware and stuff - which NAV will not cure, but the 'copy over' method WILL.