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Can't reinstall Windows 7

    Question

  • I recently bought an ASUS N53SV, due to problems that resulted in frequent blue screen and crashes(Mozilla, Chrome etc). I decided to download and re-install a fresh copy of Windows 7 Professional from digitalriver. Beforehand i ran diskchck, everythings seemed fine.

    I tried methods like booting from a USB stick, safe mode and just a double-click on Setup.exe but nothings works. Installation gets stuck halfway and i get the message :


    "Windows cannot install required files The file may be corrupt or missing.. Make sure all files required for installation are available and restart installation. error 0x80070570" The same iso file worked on other laptops. Also tried by downloading from other sources.

    I got fed up did something stupid . While booting from USB, i formatted the C: drive which is the only primary partition with an operating system. The installation failed once more and now when i start up the machine i get :

    "BOOTMGR is missing press CTRL+ALT+DEL to reset"


    I have unlimited amount of Windows 7 Professional keys from my uni and another laptop available. Please tell me what to do. Asus did not come with an installation dvd. If necessary i could buy a new retail windows 7 but will that work since nothing is left on the hard disk to start the installation? Can i still enter BIOS?

    Please help i will constantly recheck this post if you need more info.

    Sunday, September 11, 2011 8:07 PM

Answers

  • Either the .ISO file is corrupt (more on this below) or the DVD you created is defective.

    You can check to verify the .ISO file is OK as follows:

    (Windows 7 Professional 32/64-Bit)

    There are on rare occasions confirmed reports of bad media or .ISO files received from retailers.
     
    Download the Windows 7 Professional 32 or 64-Bit .ISO and follow the instructions below to create your own installation DVD. You will still use the product key you obtained but the DVD will be created from the .ISO file you download.

    32-Bit Digital River: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65804/X15-65804.iso
    64-Bit Digital River: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65805/X15-65805.iso

    Verify the .ISO file you downloaded is not corrupt:
    Download and install SlavaSoft's HashCalc
    HASH, CRC, AND HMAC CALCULATOR
    http://www.slavasoft.com/hashcalc/index.htm

    For Windows .ISO file just place check marks in the SHA1 and  CRC32 boxes. In the main HashCalc Window the 'Data format' box located in the upper left should be set to "File"

    In the 'Data' field click on the  ... box located in the upper right and then click 'Cancel' if you get an 'Insert Disk' window pop up. After you click cancle you should see a 'Find' window. Use this to navigate to the folder where your .ISO file is stored and click on the file.You should now see the .ISO file you clicked on listed in the 'File name' box located near the bottom of the 'Find' window. Now click the 'Open' button. The Data field should now show the directory/folder path and the name of the .ISO file you selected.

    With only the SHA1 and CRC32 boxes checked (Do not place check marks in any other boxes as this can slow down the time it take to calculate the values) click the 'Calculate' button located at the bottom of the main HashCalc window.

    It will take anywhere from 30 to 60 seconds for the calculation to complete and the SHA1 and CRC32 data values to be displayed.

    These values are not case sensitive, so a lower case 'a' is the same as an upper case 'A' as far as the results are concerned. However they should match those I've posted below.

    Windows 7 Professional (x86) - DVD (English)
    File Name: xxxxxxx_x15-65804.iso
    SHA1: 697FA06554502FB21D30275273B25747299C020D
    ISO/CRC: 578725D1

    Windows 7 Professional 64-Bit
    SHA1: 50127304441A793EE51B3F501289F6599A559E9F  
    ISO/CRC: 502C42C1

    Create a Bootable Windows 7 DVD using the .ISO file
    Burning a Windows 7 ISO File on a DVD
    http://support.microsoft.com/default.aspx/kb/977640

    Download and install Gear ISO burn:
    http://www.gearsoftware.com/GEAR-ISO-Burn.php

    Always use high quality media (DVD+RW) and burn the DVD at the slowest rate possible (4X or lower).

    Use your Acer windows OEM product key to activate Windows.


    J W Stuart: http://www.pagestart.com


    Never be afraid to ask. This forum has some of the best people in the world available to help.
    Sunday, September 11, 2011 8:41 PM
  • I don't know if you've fixed the problem already - But I ran into a similar problem today when I tried reformatting my mom's computer.  

     

    I formatted the hard disk and when it booted up: I got the same message as you.  However, I knew my boot cd was good since I had just used it to install windows 7 on my own rig.  

    After several attempts to get it working - I had a hunch that if I switched out the motherboard - it would fix the problem.  (My home has ALOT of spare computer parts laying around)

    I'm no tech, and I have no idea why it worked.  Thought I'd just share that.

     

    And I'm only here searching for a download of the Windows 7 iso file. (Mine is like 3 years old and I have to spend 2+ hours updating it after reformatting)

    Saturday, September 17, 2011 6:10 AM

All replies

  • Either the .ISO file is corrupt (more on this below) or the DVD you created is defective.

    You can check to verify the .ISO file is OK as follows:

    (Windows 7 Professional 32/64-Bit)

    There are on rare occasions confirmed reports of bad media or .ISO files received from retailers.
     
    Download the Windows 7 Professional 32 or 64-Bit .ISO and follow the instructions below to create your own installation DVD. You will still use the product key you obtained but the DVD will be created from the .ISO file you download.

    32-Bit Digital River: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65804/X15-65804.iso
    64-Bit Digital River: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65805/X15-65805.iso

    Verify the .ISO file you downloaded is not corrupt:
    Download and install SlavaSoft's HashCalc
    HASH, CRC, AND HMAC CALCULATOR
    http://www.slavasoft.com/hashcalc/index.htm

    For Windows .ISO file just place check marks in the SHA1 and  CRC32 boxes. In the main HashCalc Window the 'Data format' box located in the upper left should be set to "File"

    In the 'Data' field click on the  ... box located in the upper right and then click 'Cancel' if you get an 'Insert Disk' window pop up. After you click cancle you should see a 'Find' window. Use this to navigate to the folder where your .ISO file is stored and click on the file.You should now see the .ISO file you clicked on listed in the 'File name' box located near the bottom of the 'Find' window. Now click the 'Open' button. The Data field should now show the directory/folder path and the name of the .ISO file you selected.

    With only the SHA1 and CRC32 boxes checked (Do not place check marks in any other boxes as this can slow down the time it take to calculate the values) click the 'Calculate' button located at the bottom of the main HashCalc window.

    It will take anywhere from 30 to 60 seconds for the calculation to complete and the SHA1 and CRC32 data values to be displayed.

    These values are not case sensitive, so a lower case 'a' is the same as an upper case 'A' as far as the results are concerned. However they should match those I've posted below.

    Windows 7 Professional (x86) - DVD (English)
    File Name: xxxxxxx_x15-65804.iso
    SHA1: 697FA06554502FB21D30275273B25747299C020D
    ISO/CRC: 578725D1

    Windows 7 Professional 64-Bit
    SHA1: 50127304441A793EE51B3F501289F6599A559E9F  
    ISO/CRC: 502C42C1

    Create a Bootable Windows 7 DVD using the .ISO file
    Burning a Windows 7 ISO File on a DVD
    http://support.microsoft.com/default.aspx/kb/977640

    Download and install Gear ISO burn:
    http://www.gearsoftware.com/GEAR-ISO-Burn.php

    Always use high quality media (DVD+RW) and burn the DVD at the slowest rate possible (4X or lower).

    Use your Acer windows OEM product key to activate Windows.


    J W Stuart: http://www.pagestart.com


    Never be afraid to ask. This forum has some of the best people in the world available to help.
    Sunday, September 11, 2011 8:41 PM
  • I don't know if you've fixed the problem already - But I ran into a similar problem today when I tried reformatting my mom's computer.  

     

    I formatted the hard disk and when it booted up: I got the same message as you.  However, I knew my boot cd was good since I had just used it to install windows 7 on my own rig.  

    After several attempts to get it working - I had a hunch that if I switched out the motherboard - it would fix the problem.  (My home has ALOT of spare computer parts laying around)

    I'm no tech, and I have no idea why it worked.  Thought I'd just share that.

     

    And I'm only here searching for a download of the Windows 7 iso file. (Mine is like 3 years old and I have to spend 2+ hours updating it after reformatting)

    Saturday, September 17, 2011 6:10 AM