Well I use the Curse Client to update my add ons, I have never used any link from the client but I do use it to update my addons.
My machines run windows updates automatically each day but I am not 100% sure about the Adobe stuff, they may have not been 100% up to date, but I do not surf a lot on these computers and so I would think the vulnerability is when these apps hit sites that take advantage of the exploit?
I have been using Bitdefender as a virus scanner but after the hack I tried a few others including AVG and NOD32, I do not like McAfee and Norton so stayed clear of them. I also used a couple of the previously listed apps in this thread for trojans and keyloggers.