whenever I start my CPU, it runs on its normal speed for a while till Windows xp loading (processing) indication comes. After that the screen turns blank/black and the CPU becomes unbelievably slow. I encountered this problem yesterday. I have heavily invested in my computer and is afraid of any loses that may occur due to this. can u please suggest me a way to get my computer back on its normal speed. I would also like to bring it to your notice that the last my I used my computer, it shut down on its own while playing a movie and made a constant beep which indicated towards RAM issue. I removed one RAM of 2gb and then restarted the computer. it still has a 2 gb RAM but the problem of screen going blank and very very slow speed started thereafter. I had used my computer with the present 2 gb RAM many times, but it never had caused any trouble before. what to do?