Looking at the gpu specs on your computer it looks like it uses a intel gma 950.
You Also need xp service pack 3 to run legions as well, your processor seems to be sufficient (barely), as well as yor ram (which is fibe). But your gpu cannot suppirt legions
To put it into perspective the geforce 7300 can only just run legions using legions lite, and it is a MUCH better gpu than your one
This is a case of you most likely being unable to play this game ubtil you get a new computer, you are very lucky it even loads as your computer doesnt even make the minimum requirements
Mininum requirements for legions:
Windows XP SP3 with latest updates, Windows Vista™ SP2 with latest updates, or Windows 7™ with latest
updates
ATI Radeon™ x800 or NVIDIA GeForce™ 6800/8400 DirectX 9.0c (Windows XP™) or DirectX 10 (Windows Vista™, Windows 7™)
Processor: Pentium® 4 2.2 GHz, Core® 2™ Duo 1.6 GHz, AMD Athlon™ 64 2.08 GHz or better
RAM: 512 MB of available system memory
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