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Cannot install Widows. 7 after removing windows 8 and installing Ubuntu 13.04.

I have an HP Pavilion 17 with Windows 8.1. Hated Win. 8.1 so installed Win. 7 Ultimate. I ended up with a bad key for Ultimate so wanted to try Ubuntu. Like an idiot, I went over the top of 7 with Ubuntu 13.04. All was fine, but where we live I have a u.s. cellular usb modem for internet access. When I plug in the usb modem nothing happens. Nothing at all. So no internet for me. Which is really why I use the laptop anyway. I wanted to give up and just re-install my good copy of Win. 7 Home Premium-but when I got to the partition to install it on, it said I could not install it on that partition. So I deleted the partition and now have un-allocated space, but it still won't let me install 7. The error says this: Windows cannot be installed to this disk. It has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks. Really? 7 was it previously with no problem. Ideas to resolve this problem? Thanks, Linda
3 answers Last reply Best Answer
More about install widows removing windows installing ubuntu
  1. boot from the windows 7 disk
    go to advance mode/dos mode/debug.
    see if you can do a fdisk/mbr
    if not then use diskpart tools.
    http://technet.microsoft.com/en-us/library/cc766465%28v=ws.10%29.aspx
    remove the mbr and make a new one.
  2. It makes me sad when people hate Windows 8 :P (I get it though)

    Anyway, I haven't done an installation of Windows in a while, so my memory is pretty fuzzy, but:
    1. Have you deleted all partitions? Delete 'em all.
    2. Then create a new partition using the unallocated space.
    3. Install Windows 7 onto that new partition.

    That should do the trick.
  3. Best answer
    Wiping the disk did not do anything for me. The problem is what windows has done in 8 that is not compatible with 7. The UEFI is the major problem. The way I found that fixed it was this:
    Put your windows 7 disk in the drive
    At first installer screen Press Shift + F10 to open a Command Box, type:

    DISKPART
    LIST DISK
    SEL DIS 0 (after confirming Windows 7 target HD #)
    CLEAN
    CONVERT MBR
    CREATE PARTITION PRIMARY SIZE=102400 (for 100gb partition, adjust as desired)
    FORMAT FS=NTFS
    ACTIVE
    EXIT
    Then I could continue installing windows 7 and have had no issues. Working great!
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