I have some classes in school where i can use my laptop, it's a xp, not a vista.... But, about 2 days ago, one of my friends show me the turning screen function of vista (put it upside down or turned to the left/right), then i want to show that trick to another friend, but (it happens all the time with me) the resolution of the screen turned into giant things!!!

he has one dell inspiron and we have fixed that problem by going to the definitions of the screen and changing it to the nº2, but the computer gives an error that the computer can´t recognize the graphics card... Before the computer was with 300mb of memory dedicated to the graphics card and now is in 0mb....

The problem with the grapichs card has something to do with the turning of the screen??? or it´s just the grapichs card that can't be recognized??? any solution for this problem??? Please help.....
Thank's
