Help is much appreciated

When i put a flash video or a game to full screen my computer turns itselfe off suddenly. This means i can't play any games on my PC which is why i bought it. This started the moment i installed windows 7.

Also when i boot windows 7 it takes a very long time to show the windows welcome screen. Before it comes up it shows me a black screen wtih my mouse cursor on it.

CPU: Intel core 2 duo 2.67GHz
GFX: Nvidia 9800 GTX+
RAM: 4GB

Thank you very much for your time....

Check your event logs, my guess is there was a Bluescreen error that occurred. Are you using your manufacturers drivers or windows update drivers for your GFX card?

Ermmmm Windows update (I think) and how do i check event logs?

You may want to grab the latest drivers from Nvidia's website.

To check event logs:

Click on start >> In the search box type 'eventvwr.msc' >> click on system and look for errors at about the time your issue happened.

There are lots of event logs. Is there one in patricular i should be looking at?

I would be looking in the "System" log, easiest way would probably to note the time, and reproduce the error. When the computer boots up, look for an event with a red (x) near it at the time the error happened. There is usually a system file at fault, what is that file?

The previous system shutdown at 19:06:59 on ‎01/‎10/‎2009 was unexpected.

The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

NVIDIA nForce Networking Controller : Has encountered an invalid network address.

3 errors. The middle one was a x and the other two where exclamation marks. I think it sounds like the power was lost suddenly. Because my computer just turns off as if smoeone took out the plug. But how could you fix that?

Originally Posted by IThinkImGod

The previous system shutdown at 19:06:59 on ‎01/‎10/‎2009 was unexpected.

The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

NVIDIA nForce Networking Controller : Has encountered an invalid network address.

3 errors. The middle one was a x and the other two where exclamation marks. I think it sounds like the power was lost suddenly. Because my computer just turns off as if smoeone took out the plug. But how could you fix that?

It sounds to me that the problem is related to the "Enable Hardware Acceleration" function that Adobe Flash Player lets you use when you start a flash video. Normally, enabling hardware acceleration is supposed to let your video card take care of the rendering rather than relying on possibly-slower-software rendering resulting in better performance of the video's playback. It seems the flash player is not initializing your device correctly resulting in the unexpected error.

I'd bet that if you were able to turn that off, you might have some luck with the rest of your video watching until we can find you a permanent fix. Often times, disabling this will boost video playback performance as well, unless you have a really, really fast video card.

The problem is... Usually, you have to start the player and right click on it to deselect this option. But if your computer is turning off exactly when you start the player, therein lies the dilemma.

Also, this may be caused by a power drain and you PC is shut off to protect itself I.e.. your PSU may be underpowered. What kind of PSU (Wattage, make, model) are you using for your desktop?

Did you have another OS on your desktop previously? Did you have any problems there?

The only thing i know about the PSU is it's 750w. And i just got this computer from a friend who had installed windows 7 the day i got the computer... But he had windows vista on it before and i don't remember him ever telling me he had problems with it.