System freezes don't know cause, occasionally won't boot into windows

Dell Dimension 4600 seems to have a problem that I am unable to identify. The system occasionally fails to boot into windows leaving me with just a blinking cursor in the top left corner of the screen. Other time the system will boot and run for an unpredictable period of time, usually not for more than a few hours and will freeze up, not ever recovering. When it does this the only thing that works for any purpose is to press the power button and hold until a force shutdown occurs. This returns to the initial issue of the system possibly failing to boot windows.

This system has been upgraded slightly, currently running 3GB of RAM and a GeForce 6200 graphics card. Everything else is still original.

I am starting to think that one of the components in the system is starting to die. That being said I don't know where to start to identify which component that it may be. I would like to be able to continue using this system rather than have to get a new computer because a new computer isn't in my budget right now and from what I can find replacement parts for this one are fairly in-expensive. Any assistance would be greatly appreciated.

Cole

Answer this question I have this problem too

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Start by cleaning out the computer inside and out. Blow out all the dust and make sure all the fans are running. Then a scan disk and a defrag for the inside. Then i would look at the Ram remove the added ram and just run one Dimm. run the machine and see if it gets more stable. If these don't work then. We start on the video card try running this

www.ozone3d.net/benchmarks/fur/‎

It will stress test the Video Card if it fails then you know where your problem is.

After that i would look at power supply.

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Hey, you can follow the steps below to fix your Windows boot problem:

Step 1: Insert a blank CD into your computer. Download and launch Windows Boot Genius on another workable computer and click "Burn". Only one click of mouse, you can finish burning a boot CD.

Step 2: This step is operated on the computer that won't boot up. Insert CD onto your computer. And set BIOS to boot your computer from CD, instead of hard drive. It will reboot automatically and access to the CD.

Step 3: Then you will load to system. Launch this program under Win PE. Select "Windows Rescue " to follow the built-in wizard to finish fixing booting problems.

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You may want to check for blown or swollen capacitors. This can lead to all sorts of software instability and blue screen's.

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Cole will be eternally grateful.
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