Laptop freezes to white (sometimes blue, black) screen in normal mode

I bought a second hand old toshiba satellite l300 laptop from a garage sale because i was planning to use it for downloading it was a vista home premium so i updated it to windows 7 ultimate the problem is when i open it after upgrading (after few minutes) it freezes to white, blue or black screen. I rebooted it several times the same result happens.

I tried using it own safe mode but I don't experience the same problem, i just want to know what could be the possible reason for this to occur.

Lance1 said:

Update your video card drivers.

i'll try your solution and thanks for your reply