@Broni: System restore is disabled, I've had a lot of space problems on my C: Disk, and I disabled the feature. I know, stupid...
Sorry for being so unclear,what I did was the following:
I went to the site you gave me, changed it to windows vista 32-bit, clicked to expand Videos and selected the Geforce 7900 GTX option.
I let the thing download, double clicked on it and after that it installed itself and I only had to press next.
After this it asked to restart the laptop, and it did so. Then after the @windows corporation loading screen, I had these blue lines and white lines and flickering and stuff. It didn't auto restart or crash, so I manally restarted and selected the option The last known good configuration.
I double clicked on the thing I downloaded, which starts the installation screen and went through the installation and restart. During this I had my Nvidia Geforce 7900 GTX disabled by using the Device Manager and I wondered if this could cause problems.
@Carbon Dudeoxide
I'm sorry but I am rather bad at computers/laptops. Could you specify what you want me to do please, I don't know how to boot a laptop/computer with the external monitor ( nor have I any idea what an external monitor is
).
At both of you, thanks for the replies and help so far! Is it possible my graphic card broke down from crashes, or do you think it's just a software malfunction?