This is not a tutorial on settings up SVN & SSH on Windows. If you need one of those I advise you check here. In trying to setup SVN on my windows box (for christmas travel, normally I use my linux environment at home), I encountered an error where it would forget my login so instead of asking me for the password to USERNAME@DOMAIN.COM it was asking me for the password to @DOMAIN.COM. Basically half way through the process of downloading my repository it forgot my user name. After many hours searching over a couple days, a friend of mine recommended I go into the settings on tortoiseSVN and under Network I set the path to SSH client to :

C:\Program Files\TortoiseSVN\bin\TortoisePlink.exe -l USERNAME

I wont’ get into the logistics of how it worked or why it worked and honestly there is probably 100 better ways to do this, but if you are in a pinch, or just lazy, this will get you going. Thought I would share and hopefully save someone a bit of headache.