sir
I have windows xp, its SPEED was very SLOW so i changed its RAM from 128 512 mb. now when ever i starts it a caption occured on the screen regarding error and asked me to send the message to microsoft, but even then it is not corrected. Secondly when ever i OPEN the internet explorer the same caption occured again after few MINUTES, and the internet explorer closed it self and it is not possible to open it again until unless it is restarted or some time it restarted it self again and again1. Error Message. What is the "exact" message you're getting? Sometimes it is possible to search Internet (google) on a substring of the message for the cause and/or resolution.

2. Is it "Internet Explorer" which continually restarts or is the system in a continuous reboot cycle?

3. Auto Reboot Cycle. You should disable setting for "automatic restart on system failure" to break the reboot cycle. If it stops on a Blue Screen of Death (BSOD), post the "exact" STOP code string (including its four parameters) along with any short error message and/or filename it might finger as possible culprit.

Start button -> right-click My_Computer -> Properties -> Advanced tab -> Settings button within "Startup and Recovery" subsection -> Uncheck "AUTOMATICALLY restart" -> OK button -> OK button.And have you checked to see if the additional RAM will run on that machine ? ?
Not all RAM is created equal...Sir
I chnaged the ram again and the problem is solved as it was due to only by that wrong configration ram.
Thanks for your help.Good to hear you are fixed up doctor...