At the risk of prolonging an already too long thread, I'd like to underscore Shal's comment. The computing industry's attitude toward security has changed radically is the last decade or so. In much of my day in development, security was a luxury. Until the early 2000s, I don't think we ever got a pat on the back for making a consumer system more secure. What I did hear was: security degrades performance; support loves backdoors; customers hate to be bothered with security; never let security get in the way of a cool feature. I won't say that kind of thinking is gone, but now, at least, those statements are only made quietly in the corridor, not in meeting rooms. The consequence is that, as Shal points out for HTML, many things that were once hack-bait, are now much safer. Hacking is more prevalent and organized, but it has gotten much harder than the days when Telnet and knowing the commonly used passwords, ala Lisbeth Salander, could get you into anything..
Not keeping up denies you access to these increases in safety.
And it is not that hard to keep up. In my local community, I've helped seniors upgrade on very slim budgets. Refurbished computers that are tremendous improvements can be had for less than $100 with careful shopping. They can be obtained online or locally. My experience is that the best results have been through local shops that refurbish discarded computers and offer support. You can set up a quite capable system with free opensource software or community versions of proprietary software. Public libraries often provide free computing help.
Best, Marv
Marvin Waschke