I don't know the exact reason why my computer is freezing. Here is some detailed information on what happened. I was having certain issue with the system. It was freezing before also, but I removed some programs from control panel > add remove program. Things went back to normal. I am using an usb modem in my system. The system takes a long time whenever I start the screen and the dialer is launched at the startup. I tried installing and uninstalling many times but nothing worked out. I think the dialer is simply not compatible with my operating system. Then I run some updates of Windows. It worked nicely. The system was almost turned on for more than 2 hours after
shutdown with an message saying that - do not turn off the system, installing updates. I even went to that process and completed properly.
But suddenly after some time the system responded slowy. When I press Windows Key + E to run My Computer the entire screen freezes and only white background is displayed. After some long time the screen shows up. I added a new ram and can that be a cause. It was fixed by an friend and he did all things well.
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