Windows 8 and 8.1 Forums

GPT Win 8 Dual boot installation killed Win 7 MBR boot opt

  1. #1

    Geneva, NY
    Posts : 20
    Windows 7 Home Premium, Win 8 Pro DVD

    GPT Win 8 Dual boot installation killed Win 7 MBR boot opt

    I've had Win 7 Pro on my laptop for over a year. I installed a 2nd hard drive to it recently and today I installed Windows 8 Pro on the 2nd hard drive. It's been a roller coaster of good & bad luck.

    The first install went fine, until I tried to install the Windows 8.1 upgrade from the Windows store, then things went bad and I had to go into Windows 7 and eventually delete the Windows 8 volume and change it from MBR to GPT because of UEFI (no secure boot enabled thankfully). Gawd what a stretch of error messages telling me I can't install Windows 8 on the blank hard drive because it was or wasn't MBR or GPT, or the automagically made partitions weren't in the right order.

    After spending over 7 hours twice in a row installing Windows 8, I finally find out that there's no boot option for Windows 7 anymore.

    The only clue I have is to use a Windows 7 repair disk and use diskpart.exe and make the Win 7 drive "active" but that's a little foreign to me at this point.

    I'm looking in Computer Management / Disk Management from within Windows 8.

    Disk 0: SYSTEM D: 438 MB NTFS (lengthened from 199 MB with EaseUS because Acronis 2014 thought it too small while crashing), Healthy (Active, Primary Partition); Win 7 E: 930.98 GB NTFS Healthy (Primary Partition); HP_TOOLS F: 102 MB FAT 32 Healthy (Primary Partition)

    Disk 1: 300 MB Healthy (Recovery Partition) {no letter}; 100 MB Healthy (EFI System Partition) {no letter}; C: 931.00 GB NTFS Healthy (Boot, Page File, Crash Dump, Primary Partition)

    And several other external disks which don't deserve mention today.

      My System SpecsSystem Spec

  2. #2

    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1

    Set the UEFI/BIOS firmware to LEGACY OS boot & Secure Boot DISABLED, see if Windows 7 x64 LEGACY will boot.
      My System SpecsSystem Spec

GPT Win 8 Dual boot installation killed Win 7 MBR boot opt

Similar Threads
Thread Forum
Problem after xp installation for dual boot with windows 8
Hi I have a sony vaio vpcyb3v1e. I have windows 8.1 installed and i tried using a bootable usb to install as multi boot, the xp black edition on a separate partition. After doing that i couldn't be able to login in the windows 8.1 OS. I got the message Load needed DLLS for kernel. Any help?
Installation & Setup
Dual drive, dual OS Boot, not GUI boot menu.
My computer has Windows 8.1 Pro x64 on an SSD. It's that free Windows 8DL MS offered before Windows 8 was released. My son did the 8.1 upgrade. This is the boot drive. The second OS is Windows 7 Ult. x64 on an HHD. Until last week, the SSD had Windows 7, and 8 was on the HDD. The SSD is...
General Support
Convert dual installation into dual boot?
I cloned my existing Windows installation (8.1 pro, 32 bit) onto my new SSD. I got everything up and running, and I still have my old Windows installation on one of the partitions of my HDD. Can I turn this setup into a dual boot? I think this could be useful, in case the new installation gets...
Installation & Setup
Dual Boot OS installation problem
I partitioned a 1 Tb drive with windows 8 on first partition. Trying to install windows 7 on 2nd partition. Will boot from DVD & load files but when windows tries to open it stops & must restart computer to get out of freeze. Computer is Gateway DX4860-UR28.
Installation & Setup
Windows 8 installation/upgrade into existing dual boot
I have a newer Lenovo laptop with a factory Windows 7 installation in partition a and Ubuntu 12.10 installed from ISO in partition b. The dual boot manager came from the Ubuntu installation and there is lots of remaining disk space. I'd like to add Windows 8 to the boot menu, or failing that I'd...
Installation & Setup
Win 7 Computer can't find USB Printer on Win 8 Dual Boot Installation
Two different Win 7 computers on my network can't find the HP1160 USB connected printer on the Win 8 installation of my dual boot configuration. The Win 7 computer has no problem finding and installing the same printer when accessing the Win 7 installation of my dual boot configuration. Its...
Drivers & Hardware
Setup dual boot after installation?
Had a dual-boot XP/W7 laptop... XP on partition 1, Win 7 on partition 2. I booted from a USB stick, reformatted partition 1 (XP) and installed Win 8 there. It did not setup a dual boot for me. I know I should have thought of this ahead of time (my bad), BUT... is there anyway, after the...
Installation & Setup

Eight Forums Android App Eight Forums IOS App Follow us on Facebook