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Error installing XP on a HD with 7 on it

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#1 Orgeston


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Posted 11 February 2014 - 09:50 PM

Just recently my HD with 7 on it quit booting up and I would like to install XP Pro on it instead. When I boot off of the XP Pro disk the installation initializes and I select the C:/ partition (My only partition) to install the OS onto. When I do this, I get the "Your computer's startup program cannot gain access to the disk containing the partition etc." error. I would like to overwrite the 7 OS, but also retain the rest of my data. Is there a feasible way to do this?

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#2 Anshad Edavana

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Posted 11 February 2014 - 11:16 PM



If i were you, i would create at least two partitions. One for data and one for OS and programs. When a situation like this, you will be able to easily re-install the OS. You need to re-partition the  disk to install XP which will remove all your data. Besides that, XP support will be ended in April so it is not wise to use XP. What i would recommend is to fix the Win7 and continue using it.



#3 hamluis



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Posted 12 February 2014 - 06:31 AM

FWIW:  The boot files for Win 7 are different from the XP boot files, hence the error message if you did not delete the Win 7 partition before attempting to install XP.  Win 7 can overwrite XP boot files...but the reverse is not true (because Windows does not normally allow an older version to overwrite boot files from a later version).


Anshad's approach is best, especially if you want to retain anything on the current Win 7 partition.


If you do not want to retain anything...just delete the existing Win 7 partition and then install XP (which I would not suggest, for reasons stated by Anshad).


I should also mention that...if the system came with an OEM version of Win 7, as laptops do...then you need a valid non-OEM license to install XP on that system, since the license applicable to the system is for Win 7.



Edited by hamluis, 12 February 2014 - 06:34 AM.

#4 cryptodan


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Posted 12 February 2014 - 06:48 AM

Is your current Windows 7 installation installed using UEFI GPT Partition?

http://technet.microsoft.com/en-us/library/hh824898.aspx - You may have Secure Boot Enabled and that is why you get the error that you do. I have never seen that message on any Windows machine that is formatted via Windows NTFS File system from Windows 2000 to Windows 7, but I have not used UEFI Enabled / capable BIOS on a motherboard.

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