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I am living somewhere with 100 megabit internet. I have a laptop running vista and a (new) desktop running windows 7. For some reason, I have a lot of trouble downloading things on my desktop.

For example, I attempted to download the miktex installer, and the download speed was around 10-15 KBps. This problem is not consistent- after trying for about 10 times I was able to download the openoffice installer, which is approximately the same size as the miktex installer. I was able to download the adobe flash player installer, but it fails to work because the installation requires stuff to be downloaded and my download speeds are abysmal.

I don't have any of these problems on my laptop, even though I use the same ethernet cable for both machines. Nominally, when I run a speed test through my desktop, it says my download speed is around 94 Mbps. My browsing is a little slow but nowhere near 10-15 Kbps.

I have tried everything I could think of for this machine- I reinstalled windows twice, I played with the network card settings, and I tried running everything in safe mode, but to no avail. Does anyone have any idea what the problem could be?

Update: I bought a new network adapter and that seems to have completely solved the problem!

Update 2: Okay, the new network adapter worked for a few hours and now it is failing again. I have no idea what could be causing this. Please let me know if you have a suggestion.

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Sounds like a dying motherboard...ouch! –  Scandalist Jun 23 '13 at 0:44
    
Have you tried connecting your laptop or desktop directly to your modem and seeing how your download speeds are? –  Huskehn Jun 23 '13 at 2:37
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