Increase the following: your physical ram, and the pagefile size allocation to windows.

Then run: disk cleanup, defrag, scandisk to free up disk space (sounds like your hdd's pretty full if winblows is having issues finding a spot to write it's virtual memory stuff).

And one final question: Wtf are you doing running a technology that's 7 years behind the curve? It might be time to consider purchasing a new(er) computer or upgrading the one you have, eh?