Intermittent freezing of the computer when opening programs

Hello. I have intermittent freezing problems which I will try to describe. About 5 to 7 times a week I click on a link like Comcast Mail Office.

The 'think' rotation slider will begin, the page does not load and then a message appears after a minute or two for example 'Windows cannot find Comcast.net' the only way I was able to solve this problem is to restart with the power-it button does not restart by using the standard method. I pretty much can do nothing until I restarted and then the computer works well. Comcast has tested the modem and the connection and says it's ok.

The issue occurs at random times. It happens more frequently when I begin a session, but it froze several times while I'm running an application or are already on the internet. I performed the tests in the pc tools and things seem ok. I have 3 GB of ram and a measure of consumption on my desk that indicates normal operation.

Any thoughts would be appreciated. It is far from aggravating and barely embarrassing, but I would like to know the cause.

Hi Kenny,

Please see the following thread (even if it is a different issue, some of the troubleshooting steps are the same):

http://answers.Microsoft.com/en-us/Windows/Forum/Windows_7-performance/Windows-Explorer-has-stopped-working/6ab02526-5071-4DCC-895F-d90202bad8b3

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