Frontpage
Forums
Tutorials
Members
Calendar
Subscription
Donate
Links
Contact 
Help
-----------------------------------------------------
With Windows 7, you now have the option to boot the OS from a VHD, a virtual disk file, instead of a partition. This way, you don't have to reconfigure your hard drive partitions.
Limitations: Hibernate is not supported.
Here are the simplified instructions:
1) Start Windows 7 installation from DVD.
2) Press Shift+F10 to start the command prompt.
3) Start diskpart.
4) Use the "create vdisk file=D:\Win7.vhd maximum=xxxxx" to create a virtual hard disk. Choose your drive and filename accordingly. xxxxx is in MB.
5) Type "select vdisk file=D:\Win7.vhd".
6) Type "attach vdisk". You will get a confirmation that it was attached.
7) Type "exit" to exit diskpart. And then close the command prompt.
8) Click on "Install Now" and install as you would normally by clicking on "Custom Install". Choose your attached vdisk as the location.
The installation takes care of adding the boot option to bcd. You don't have to do anything.
See Virtual Hard Disk Booting on a tutorial for VHD booting.
also check this out: Install Windows 7 to a VHD and add boot option to Vista's menu.
Basically, instead of installing windows 7 to your physical HDD by getting rid of Vista or even dual booting off another partition, you can install to a virtual HDD (in VHD format), and boot off the VHD so you actually get the hardware functionality to play with!!
Build 7068 does not allow calculation of the WEI score.
2. Install Existing VHD to Boot Menu of Windows 7
-------------------------------------------------------------------
If you already have a VHD that you want to boot from, you can simply add it to the boot menu rather than going through the above steps. If you have a Virtual PC image, for example, you can syprep it, then add it to Windows 7 menu. Vista's boot manager will not work - you have to update it to Windows 7 boot manager if you want this to work.
First, here how to add the vhd to the boot menu:
Open elevated command prompt, then type the following commands in sequence:
C:\>bcdedit /copy {current} /d "My New VHD Description"
C:\>bcdedit /set <guid> device vhd=[driveletter:]\<directory>\<vhd filename>
C:\>bcdedit /set <guid> osdevice vhd=[driverletter:]\<directory>\<vhd filename>
C:\>bcdedit /set <guid> detecthal on
Note: The first command will Return the GUID of the Loader Object that you will use to replace <guid> below
Note: vhd=[driveletter:]\<directory>\<vhd filename> is the new syntax supported for BCDEdit.exe to locate VHD File and Bootmgr will locate the partition containing the VHD File to boot from.
Type bcdedit /v to check the bcd store.
3. How to Boot VHD without Windows 7 Installed
-----------------------------------------------------------------
If you have Vista and want to boot a Window 7 VHD, then you need to copy the boot manager of Windows 7 to Vista's partition. You need to copy C:\bootmgr and C:\windows\system32\bcdedit.exe to an external source from Windows 7. You could extract these files from the Windows 7 VHD using WinImage or another program.
Then, open an elevated command prompt in Vista and unhide bootmgr (attrib -h -r -s bootmgr) and replace it with Windows 7's. Do same for bcdedit. You might consider making backup copies of these files before replacing them.
Then, add the VHD item to the boot menu using #2 above.
4. How to Remove
-------------------------
To remove, run the following command in a elevated command prompt:
bcdedit /delete {guid} /cleanup
Delete the vhd file.
This post has been edited by spacesurfer: 03 April 2009 - 04:49 PM
Back to top
) attempted to ask help with since a couple of years:
