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My windows 7 screen goes blank randomly

Toshiba / Satellite l455
September 8, 2010 at 22:12:06
Specs: Microsoft Windows 7 Home Premium, 2.194 GHz / 2936 MB
Please take pity;My toshiba satellite L455 windows x64 ie8 & firefox 3.6.9[i use the firefox] Anyway the screen turns bright white while i'm using it.[Not like it does when it changes tone a bit to show it isn't responding.]This happens randomly and often.No matter what im doing any program any action and its been at least a month, by the way the computer is 6 months old if that helps. It only stops when I hit windows key and press the icon for what i'm doing on the taskbar. Ive ran several scans with McAfee and now Norton & they all say its clean.I went through all the settings I could find, but im not savvy to say the least where computers are concerned,Can any1 please, please help?

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September 8, 2010 at 23:31:57
How long does it work in safe mode?

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September 9, 2010 at 18:59:16
what is safe mode? and how do I use it?

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September 10, 2010 at 17:17:39
found safe mode and read how to use it and have started it with networking; and it hasn't happened since.Can any1 tell me what I should do?Have I got 2 spend a fortune?Or is there a way I can run some diagnostics?I tried all the 1s offered while browsing through different help pages.I also set it back to an earlier time b4.

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