AFAIK, in order to "load balance" a windows box you needed a fancy router capable of doing it, paired with some fancy software install @ the box (usually provided by the router manufacturer).
However, I've been told that some tools can be installed at the PC and they will "mingle" with the networking, sending some packets through one interface and some packets through another interface.
I've also been told this approach can sometimes be counter-productive because some PCs can't handle the extra overhead fast enough to get any benefit. But on some instances (like when downloading large files split into multiple parts) the user can see a substantial benefit in increased bandwidth.
I've google'd for such a tool to no avail. It either doesn't exist or my google-fo is weak. Anybody can shed some light on this?