Windows update working now.
I'm putting all my questions in ordered format so its easier for you
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1. By the way, I downloaded that keystroke scrambler thing and I can't get into a forum I use now - not sure if the two are related.
I'm also having trouble with facebook - I can't click any of the tabs - I downloaded the no script program as well - don't know if that interferes?
Oddly, the problem is with firefox, everything works ok in chrome.
2. I went to the nvidia site but nothing happened.
3. I've downloaded everything that seemed suitable from that page you gave me a link to - which was pretty much everything - except that I use sumatra rather than foxit and CCleaner rather than TFC. The only other thing I didn't do was, I run malwarebytes but it also suggests spywareguard and spywareblaster - are these necessary?
4. Finally, I use windows firewall, can I stick with that or should I download zonealarm for example?
5. By the way, what does opendns do?