Buy a new and way better computer IMO, with with a nice multicore processor (6 or 8 are decent), loads of ram (16gb) so obv windows 7 64bit + os to support the ram and should be good to go.
If you want uber speed on startup and in the case of running any tracking software then solid state drives are where its at.
I know the site is a bit of laggy for me in itself, never played that much on there but in comparison to other sites. But if you machine really only has 1gb of ram then its quite old and probably time to invest in something new or do some major upgrades.
TO keep it simple, having CPU issues then the CPU isn't fast enough to keep up with what your trying to do.