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Windows 7: Dual Boot windows 7 and 8 on new toshiba satellite?

21 Jan 2013   #1
worf65

windows 7 pro x64
 
 
Dual Boot windows 7 and 8 on new toshiba satellite?

I have a new toshiba satellite p870 that came with windows 8 and I would like to install windows 7 on its second hard drive for compatibility reasons. Every time I try to boot from the windows 7 setup disc it gets stuck on the "starting windows" logo screen and will not proceed. I have tried both booting from the disc and doing a custom install from inside windows 8 with the same result. It was necessary to disable secure boot in the bios in order to get the disc to begin to boot. This computer has 2 hard drives and I am attempting to install windows 7 to a partition on the second drive (the main drive had an error about GPT). I am using a windows 7 professional disc received from microsoft a few years ago to avoid burning a new disc. I have set up dual boot on several other computers but this one is different, Is there anything I can do to get this to work?


My System SpecsSystem Spec
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21 Jan 2013   #2
gregrocker
Microsoft MVP

 

You'll need to follow steps here to Downgrade Windows 8 to Windows 7 to turn off Secure Boot and then install Win7 in UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with, after wiping target HD with Diskpart Clean Command to clear any formatting.

If problems persist many have had success with these steps to Bypass UEFI to Install WIn7.

You will need a Win7 retail Product Key to do this.
My System SpecsSystem Spec
21 Jan 2013   #3
theog

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Take look at the NOTE at end of this tutorial:
Downgrade Windows 8 to Windows 7


You will need to buy a Windows 7 license,
My System SpecsSystem Spec
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21 Jan 2013   #4
worf65

windows 7 pro x64
 
 

Now I have a big problem. I got the window 7 disc to load and attempted to install it (the computer would not boot from USB, it says that there is no USB boot option). Windows 7 was unable to create a new system partition so I tried deleting all partitions on the drive (a second blank hard drive). Now the computer won't boot at all even with this hard drive removed, it tries to boot from the ethernet port without a disc, using the install disc I can see that the original partitions are still intact. Beforehand I changed the boot mode to CSM as instructed in one of those tutorials. What happened? This new EFI system is giving me lots of problems.
My System SpecsSystem Spec
21 Jan 2013   #5
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

See whether you can set your BIOS to legacy mode.
My System SpecsSystem Spec
21 Jan 2013   #6
gregrocker
Microsoft MVP

 

Did you try to boot Win8 after you changed the CSM setting? If not, change it back.

It should have been set for both modes UEFI-BIOS to keep Win8 booting and install Win7 to an MBR disk normally. If you want to install Win7 also in UEFI then keep UEFI setting.

In addition if you enabled Legacy BIOS then UEFI Win8 may not boot.

Make sure the Windows Boot Manager is set first to boot in BIOS setup. If that fails try UEFI HD with Win8.
My System SpecsSystem Spec
21 Jan 2013   #7
worf65

windows 7 pro x64
 
 

Quote   Quote: Originally Posted by gregrocker View Post
Did you try to boot after you changed the CSM setting? If not, change it back. It should have been for both modes to get the extant OS to boot.

In addition if you enabled Legacy BIOS the UEFI Win8 HD may not boot.

Make sure the Windows Boot Manager is set first to boot in BIOS setup. If that fails try UEFI HD with Win8.
I'm not sure what to do. I can't get to the bios without going through windows 8 but I cant get windows 8 to boot and the windows 8 disc doesn't have the same recovery options as the actual OS so I can't use it get to bios.
My System SpecsSystem Spec
21 Jan 2013   #8
gregrocker
Microsoft MVP

 

Tap the key given for BIOS setup on first boot screen.

What are the CSM settings choices? If you want to install Win7 to an MBR disk normally then you want Dual mode UEFI-BIOS. If you want to install Win7 in UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Forums choose UEFI all the way.

On a Win8 laptop you only need to turn off Secure Boot to allow Win7 install in UEFI mode even in a Dual boot, as shown in Downgrade Windows 8 to Windows 7

If changing the settings back fails reset BIOS to defaults, Save and Exit.
My System SpecsSystem Spec
21 Jan 2013   #9
worf65

windows 7 pro x64
 
 

Quote   Quote: Originally Posted by gregrocker View Post
Tap the key given for BIOS setup on first boot screen.
There isn't one on this computer. I don't even see the Toshiba logo before it goes to what its trying to boot from (windows disc or failing to boot from the Ethernet).
My System SpecsSystem Spec
21 Jan 2013   #10
gregrocker
Microsoft MVP

 

Every PC has a BIOS setup key. The key on Toshiba is F2.

How To: Enter the system BIOS or UEFI in Windows 8 - Toshiba Forums

You may need to access Windows 8 Automatic Repair from booted Win8 installer or Repair CD to get the Advanced Options for UEFI as shown in the OEM section.
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 Dual Boot windows 7 and 8 on new toshiba satellite?




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