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When I switch on my laptop (which was initially shut down), I am getting black screen for 30 seconds after which windows 7 logo appears and after that login is requested.

What should I do to correct this black screen problem?

Laptop specificatoin i3-370 M processor 2.40GHz Windows 7 home premium

Thanks

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How long has it been like that? What have you done with the computer recently? Have you installed any new software or updates? –  gronostaj Aug 29 '13 at 19:04
    
capture a boot trace with xbootmgr and upload the zipped trace so that I can see what is going on: msfn.org/board/index.php?showtopic=140247 –  magicandre1981 Aug 30 '13 at 4:19
    
@gronostaj I thought exactly like you and even reinstalled the OS but the problem is still persisting. P.S: I have installed only those softwares which I have been using from long time but recently I have kept my computer to more hibernation. And also I ran MATLAB simulations in accelerator mode in a 2 month period. After this only the black screen problem has started. –  Bala teja Aug 30 '13 at 6:23
    
@magicandre1981 I can't install the SDK since I am using internet from college proxy. Could u provide other ways? –  Bala teja Aug 30 '13 at 12:36
    
download the ISO from a second PC, mount the ISO and run the setup: microsoft.com/en-us/download/details.aspx?id=8442 –  magicandre1981 Aug 30 '13 at 19:14

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