Nearly nonexistent upload speeds

All righty there gurus, I'm officially baffled...
To my knowledge, nothing at all on my computer has changed prior to this issue cropping up. I just suddenly noticed I had NO upload at all. I'm on a 10/1 connection, and all speedtests, uploading photos to Flickr, etc, show that while running in normal mode (Vista x64 Ult), I have a zero upload speed. This also appears to be happening on my laptop in its Vista copy, which is odd. However, both seem to work just fine in safe mode - I get right around the 10/1 values on tests run while in safe mode w/ networking.
IRC folks had me trying netsh commands all night to no avail, and I don't see anything in my msconfig that I think doesn't belong there, but here I am all the same, groveling at your feet in the hope that somebody has some tiny trinket that can help me...
I first noticed the trouble maybe a day, day and a half ago, and it was noticed through my router/network; I've since disconnected the router and jacked directly into the modem, and no dice.
I'll be at work all tomorrow, but will check in and try to report any answers I can remember while there.
To my knowledge, nothing at all on my computer has changed prior to this issue cropping up. I just suddenly noticed I had NO upload at all. I'm on a 10/1 connection, and all speedtests, uploading photos to Flickr, etc, show that while running in normal mode (Vista x64 Ult), I have a zero upload speed. This also appears to be happening on my laptop in its Vista copy, which is odd. However, both seem to work just fine in safe mode - I get right around the 10/1 values on tests run while in safe mode w/ networking.
IRC folks had me trying netsh commands all night to no avail, and I don't see anything in my msconfig that I think doesn't belong there, but here I am all the same, groveling at your feet in the hope that somebody has some tiny trinket that can help me...
I first noticed the trouble maybe a day, day and a half ago, and it was noticed through my router/network; I've since disconnected the router and jacked directly into the modem, and no dice.
I'll be at work all tomorrow, but will check in and try to report any answers I can remember while there.
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Either way, Windows Update finally let me install SP1 and it fixed itself... so I guess I'll never know what it was. Thanks guys.