A media PC even 5 years old should play allmost all games within the game specs.
I post about this subject often and alot of posters do it here also.
Check your chipsets.
Packard Bell used just about every brand of chipsets. Intell, Via, Sis ect..
They use whatever is the least epensive at that manufacuring time all they have to do is use another board number and push another button at surface mount.
Watch the bios while booting it should let ya know what chipsets you have.
Look in hardware manager- system devices for the chipset drivers.
Any yellow question marks somethings wrong and check the drivers should match the bootup bios.
A possible mixup in the factory install disk, it might have the wrong chipset drivers cause they used so many brands. This kinda thing happens, I know alot of mistakes fall down the cracks from too much manufacturing experience.
If the wrong drivers is installed most video seems normal but no gamer excelleration.
Ya might want to download, install and burn the update chipsets anyway.
Opps did I say what? If ya cant talk the talk, walk the walk. Am i coo coo I like it and dont use spell check.