Tecra S2: strange dots on screen appearing with no reason and at random

Hello,
I have a Toshiba Tecra S2 laptop for almost a year now.
I formatted it 2 months ago and when i did this. i had stranges dots on my screen, appearing with no reason and at random. I dont have a clue where it came from and i decided to format my computer again.
I've installed the latest chipset driver from the intel website and then i've installed the latest driver from the toshiba site.
I've noticed the problem is back. so that didn't solve anything. What can I do about this?
PS, not only the dots, but i cant play games also.

HI Jelle,
When you say that you formatted your notebook, did you completely re-install the operating system from the recovery discs ? If you did then the display should work correctly.
If you installed the operating system from Microsoft discs then you will need to download the correct Toshiba drivers for your Tecra from the Toshiba web site download page.
regards,

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