I usually pull back to just one stick of memory when troubleshooting or 512.
Go with what works best for you.
A while back a guy told me it was better to have 512 megabites of ram then have 768 beacuse the extra 256 isnt used right by windows. I took the 256 out to see the difference and it slowed my computer down. That or im just being over concious. SO what hsould i do put it back in or leave it?