Hi MM,
I did a potentially very dangerous thing. With full knowledge of the consequences and all the tools to recover the mess if required. I did get the required end result, which was the mess of old files and settings removed. Also I have refreshed the base install of Windows7. I've been playing with the idea that I could upgrade to Windows8 for quite a while now. It's faster and leaner, but I just can't stand the interface for day to day working. I have far too customised a machine and I know from my Laptop just how irritating it can become.
For normal day to day work, I never see any of these Virus issues. I do see loads of dodgy emails, but then I'm subscribed to, quite literally, hundreds of places who have my email address. Many of whom have a policy of selling on the information for money. I also see the popups, but then I go places where the sites try to attack my machine from the second I hit the site. The benefits outweigh the hassle with popups. They have to make money somehow.
If you have a good AV/Firewall suite, have a decent email provider, keep your windows up to date, don't give your email address to all and sundry (for sites who simply do not need my email address, they get
noddy@toytown.com which is a valid address), then you are extremely unlikely to see most of this malware. Also facebook is becoming a major feeder to malware with open information which they can harvest addresses from.
There is no need to have malware attacking you, no need to be affected by most of the problems seen. Windows now asks if you really do want to install stuff, which catches most of the junk, quality anti virus and firewall suites do exist but you have to pay for them.
Also, something which is never considered nowadays but was a big issue at the beginning of broadband, is home routers. Almost everyone, today, who accesses the internet, does so from behind a router, which has it's own firewall. People with so called adsl "modems" are massively at risk because of the lack of that firewall. This has all but died out due to the very low price of routers, but some still exist.
It is not so unusual for people to run for years without issues of this kind. But you will find that those people have limited browsing lifestyles, do not click on links, do not launch attachments from mail and have paid protection installed on the machine. Also, usually, they don't install freeware tools which then frag the whole system.
So long as you continue to work the way you do, I see no reason why you should ever be infected or have any problems beyond the usual 5 year hardware MTBF (mean time between failure), issues.