I'm assuming you are running Win7 which requires a min 2Gb to run.
At least your video card is dedicated so that is helping.
Try popping a 2 - 4gb thumb drive in and enabling it for ReadyBoost to increase your Ram.
WGT is Flash based, in this instance Flash is extremely demanding on your memory.
Try using CCleaner to do a system scan and clear out some baggage yu are carrying around.
Also use the option with the TOOLS area, to check all the baggage that is starting up with windows.
Do everything else before thinking about RAM, browser, startup, cache/ cookies etc.