Need Massive Help PLEASE!!!!

Alright, heres my deal, for some reason when i upgrade OR download a new software it cant connect to the internet. Firefox did this when i upgraded it and i had to downgrade back to .6 for it to work. i upgraded iTunes, now it doesn't work. Google earth couldnt connect when i downloaded it. i thought it had something to do with my firewall, but you see, i don't have one. the only one i have is windows firewall. and i put iTunes and the other software in the exceptions and it still didn't work.

so i just straight up cut the firewall off and still the same issue. i have no idea on what to do. i contacted the iTunes customer service to see if they could help and they didn't know why. i ran the diagnostics and it said that my network was connected and nothing was wrong but the software just couldnt connect!

i REALLY need help with this! i will legit be in love with you if you help me resolve this!

just for kicks here are the iTunes network diagnostics:

(text document in the attachments)

Make sure you have secure transfer activated on your computer. It will most likely be located on ActiveX.

Could be a possible DMZ on your Router if you have one.

Can you go to, Run, CMD, Ipconfig/all and post what it says please.

Also, have you checked if the ports are open?
Are you running Windows Firewall?