If you're using the default directory, delete all the stuff in your /users//appdata/roaming/bitcoin folder make a new bitcoin.conf file. After blockchain is done downloading, change maxconnections, also change listen to 1 (if you want), and maybe you need to change keypool to make a majority of addresses you probably wont need to have your wallet bloating
This doesn't make sense. Why would you delete the local blockchain, then download exactly the same thing?
Agreed, this is terrible advice. The blockchain is 25.5 GB right now, there's no way I'm going to delete & redownload it just for the hell of it.
In any case, I figured out a solution to the problem a little while ago: I ratelimited bitcoin-qt's upload speed to about 1/3 of my bandwidth several days ago in Netbalancer, and then put Netbalancer in my Startup folder so that it'll stay that way. Seems to have fixed the problem.
I've updated
the wiki to mention this issue and explain how I successfully worked around it in Windows. If anyone has any recommendations for other places to put this information on the wiki that people will be likely to see, please let me know and I'll be happy to add it in there too.