mrpanda :
Gateway GT5449E
CPU: Intel Core 2 Duo E4300 1.60GHz
Socket: 775 LGA
Motherboard Model: D945GCF
RAM: 2GB DDR2
Not really any 'upgrade' path.
If you change one thing, the rest of it is very underpowered.
So you have to change everything, and build a whole new PC.