BSOD Toshiba A300D BCCode:c000021a

Hi all, This is my first post here. I am sure you can help me. I am running Windows 7 Ultimate 32 bit on a Toshiba A300D-14D. This laptop came with windows Vista 32 bit installed. I checked toshiba's website and the drivers were not developed for Windows 7, (only Vista) so I believe there should be an issue regarding the drivers . Before I had BSOD and random freezes. I solved the random...