Put this in your Skyrim.ini file from My Documents to fix any lag/stuttering and increase FPS if you run an AMD/ATI card. I got 10-14+ fps on it and no lag at all. If you do want to buy a card, don't pick ATI unless you are an idiot ( I got my laptop as a gift, not my fault )
[Papyrus]
iMinMemoryPageSize=100000
iMaxMemoryPageSize=5000000
iMaxAllocatedMemoryBytes=1800000000