Anti-aliasing problems

Hi guys,
Just got a new laptop - Sony VAIO PCG K86P
P 4 - 3.2Ghz
1 GB RAM
ATI Radeon 9200 gfx card (guessing its mobility) with 64MB RAM
Still have to post some shots for you guys
but first I need to sort out a little problem. I find that when flying in MSFS, if I press alt or hit "alt + tab" to change music or something, when I come back to the sim, I've lost my anti-aliasing and everything's jagged. If I press alt again (or alt tab) my anti-aliasing comes back (sometimes I have to try a few times). I'm guessing its a driver issue as I'm using the drivers that came with the laptop but if anyone can point me in the right direction:
Which drivers I should get? (best for the 9200? are there specific ones for the mobility range?)
And also if anyone knows a precise step-by-step guide to installing the drivers, that's be good. Ive had a lot of bad experiences with the blue screen of death with my old PC and the only thing that saved me was XP
;).
Any help much appreciated,
Thanks,
Adam
(EDIT): Also, I forgot to ask. Is it normal for only horizontal parts to be anti-aliased with the vertical sides left jagged. I know on my Ge force the whole thing was just smoooooth. Thanks again.
Just got a new laptop - Sony VAIO PCG K86P
P 4 - 3.2Ghz
1 GB RAM
ATI Radeon 9200 gfx card (guessing its mobility) with 64MB RAM
Still have to post some shots for you guys

Which drivers I should get? (best for the 9200? are there specific ones for the mobility range?)
And also if anyone knows a precise step-by-step guide to installing the drivers, that's be good. Ive had a lot of bad experiences with the blue screen of death with my old PC and the only thing that saved me was XP
;).
Any help much appreciated,
Thanks,
Adam
(EDIT): Also, I forgot to ask. Is it normal for only horizontal parts to be anti-aliased with the vertical sides left jagged. I know on my Ge force the whole thing was just smoooooth. Thanks again.