I have the following problem: I try to open Google, Youtube or some other pages and I can't use them. All I get is the "Connection has been reset" message. Help?

Question

The only way I'm able to use Google and YouTube is by using HTTPS, but the thing is that by using HTTPS, I can only use SSL Google, which lacks Images and several other useful features.
As for YouTube, it's perfectly normal.
Wikis load like snails, and some don't even load at all. Not even with the HTTPS. Also, when I try to update Java, it tells me that my Internet Connection Settings are wrong. Not sure if that's the problem, though.
If it's any plugin I'm missing, I'll gladly install it (just don't trick me into viruses, please).
I've already cleaned my cookies (15 times, no kidding), checked the firewall, etc.
I haven't checked my Internet Settings because I don't want to screw things more than they already are. But I doubt that's the problem.
I checked for viruses, spyware, and the like, but my anti-virus software (ESET) detected nothing.
I've also went to the Network "Repair" in "My Computer" and restarted my PC twice.
I really need things back to normal, so any help would be really appreciated.
Thanks.

Answer 1

'''FIRST''' Install a new version of Acrobat.
Then....
1. Go To '''Firefox''', '''Preferences'''
2. Click the''' Applications''' tab
3. Scroll down to''' PDF File'''
4. Under '''Action''' click on the drop down menu next to it.
5. Click '''Use other...'''
6. Select the '''NEW VERSION '''of Acrobat that you just installed.