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This is the first PC I have ever built, but I built it with a buddy who is very experienced and everything went okay. The computer is maybe 3-4 weeks old now, everything is running fine, until today when I decided I wanted to try streaming some Diablo 3.

This is when I discovered my upload speed was absolute garbage.
I have verizon FIOS - I pay for 15/5, the download speed is always at 20+ mbps, I have never had any problems with it., but my upload speed is fluctuating between .34-1.5 mbps, changing every second.

I know this is a problem with the computer because I brought in my old laptop, unplugged the ethernet from my new desktop, plugged it into the laptop in order to keep all variables the same, and it was getting 25/5 without any hesitation.

I know next to nothing about networking, but I'm praying that this is a software issue and NOT a hardware issue.

Should I reinstall windows? I have no problem with doing this if you guys believe it will solve my problems.

When I was downloading the drivers for my mobo I installed something called Windows Firewall with Advanced Security(maybe that was with a windows update, im not sure). Could this be blocking some upload speeds, Just from looking at the program its clear it deals a lot with incoming and outgoing connections. I am not familiar with this program, hopefully some of you are.

Specs of my PC (if this matters)
-Asus P8Z77-V LK
-8g ddr3 Ripjaws
-i7 2700k
-Corsair H60
-EVGA GTX 670
-Crucial 128g M4 SSD
-Caviar Blue 1TB HDD
-750W OCZ Modular PSU

If you need any more information to diagnose this problem please dont hesitate to ask, I will be checking this thread frequently throughout the night seeing as I am the kind of guy who wont sleep until this problem is fixed >,<