I just downloaded and installed bitcoin, and when I want to start it, i get the message

"Warning: disk space low"

And when I dismiss it, bitcoin exits without warning. If it's a warning, it shouldn't exit. If the message is correct and it can't run bitcoin for some reason, it shouldv'e been an error, not a warning.

Besides, I have over 2GB free on the disk I installed it to. The only thing I can think of is that it wants to use the C: disk for some weird reason, because that disk has just 5MB free, and that can't be helped because windows 7 is such a space hog.

How can I run bitcoin anyway?