bluescreen 0x000000ED windows 7 dont load

I have an acer aspire 4752ZG laptop. And i am experiencing a start up and repairkit launch problem after i installed updates from microsoft. When i start the laptop it shows two choices. 1) launch start up repair kit 2) start windows normally I choose start windows normally. After choosing start up logo appear and i wait for few minutes then it goes blue screen and it reboot automatically. Then after the reboot same two choices,this time i choose launch start up repair kit after i choose it says windows file loading. And.after the loading it goes black screen. I thought it was just some delay. And waited for 20 minutes and still on black screen. And i noticed the lights on the hdd indicator goes off.It should be on if its still working and not frozen. So i tried to do booting from cd . It read the cd but when i install the cd it freezes all the time. What should i do? What is the main reason of this problem. Waiting for reply.

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Roger

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