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I'm running Windows 7 with a wired connection to my Verizon FIOS router. My download speeds are usually around 80 Mbps, but my upload speeds are lucky to break 1.0 Mbps. This is a new problem, although I haven't changed anything about my set up. We did, however, suffer a bad storm and power outage before all of this happened.

My wireless network -- plugged into the same router -- is fine. My laptop connected via ethernet to the router is fine. (Upload speed is usually around 30.0 Mbps.) So it's only on my desktop that this problem is occurring.

I've tried everything I can think of or find to fix it, with no success.

Any thoughts?

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Can you explain some of the things you did to try to fix it? That way we don't just repeat every thing you've already tried. –  imtheman Jul 18 '12 at 20:25
    
Replaced the ethernet cable. Ran the FIOS TCP/IP optimizer. Powercycled everything. Cleared the internet cache and temp Windows files. Tried different browsers. I even tried hooking a wireless adapter into the desktop, with the same results. –  David Montgomery Jul 18 '12 at 20:41
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Have you tried different ethernet ports on your router? (I don't think that's the problem, but I guess it doesn't hurt to try) What NIC are you using? If onboard NIC have you tried adding a PCIe NIC? –  imtheman Jul 18 '12 at 20:50
    
If you suspect damaged hardware you should see if the problem also occurs when you use another OS, e.g. a Linux live system like Knoppix. –  Gurken Papst Jul 18 '12 at 20:52
    
I've tired different ethernet ports on the router. (And the router's brand new -- Verizon came out and changed it.) –  David Montgomery Jul 18 '12 at 21:10
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1 Answer

Since you don't have the problem on your wireless router connected to the same router, and you changed the ethernet cable, I think you're right in assuming that the problem is inside your machine. By chance did you try, if possible, a different ethernet port on your router (assuming it has more than 1).

The fact that you tried a wireless adapter on the desktop makes me doubt it is a problem with the ethernet card, however I still want you to try and removing the ethernet card drivers and let Windows automatically find and install new ones.

After that, could you by chance try booting into another OS like Ubuntu from a Live CD and see if you still have the same upload issue from there? That way we can get closer to knowing if it is a software or a hardware problem.

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I uninstalled the etnernet card and removed the drivers. Rebooted and Windows found and installed it automatically. Ran the speed test and got a good result. Ran it again and got crap. (Something similar happened previously -- one good test, then nothing -- although not connected to the ethernet drivers.) I've never done anything with Ubuntu (etc.) but I can try to figure it out. –  David Montgomery Jul 18 '12 at 21:23
    
Wait so, it worked fine the first time you ran speed test but not the second time? Keep in mind that speed test results will also depend on the server chosen. –  ioSamurai Jul 18 '12 at 21:25
    
I have twice now gotten a decent speed after some type of change and a fresh reboot. But the speed is never duplicated, either by testing the same server or different ones. –  David Montgomery Jul 18 '12 at 22:30
    
I booted with Ubuntu from a USB and everything worked fine. Good, repeatable speed tests. No slow down. But when I rebooted Windows, I had all kinds of trouble getting it loaded. It kept hanging on Startup, crashing, etc. When I finally got it booted up, I ran a speedtest. Great results. Ran the test again, same server, and the slow upload was back. So it seems Windows is screwed up somehow. But with really odd results. –  David Montgomery Jul 19 '12 at 0:01
    
@DavidMontgomery Curious indeed... are you able to see anything happening in the Windows Event Viewer around the time of the power outage, or something new now showing up after the power outage? Worst case scenario, you might have to make some backups of your data and do a fresh install of Windows... –  ioSamurai Jul 19 '12 at 14:39
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