Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: How to install windows 7 to usb external hard drive

21 Nov 2012   #21

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64

What did you use to create the partitions on the usb drive?

Did you use win7 diskpart.exe?

Have you set a partition Active?

Boot indicator bytes in partition table should be either zero or 0x80 (that means bootable).

The message indicates those values are not right.

You might try using a free 3rd party partition manager.


Have a look at the usb drive.

Inactivate and reactivate the install partition on the usb drive.

See if that fixes it.

My System SpecsSystem Spec
21 Nov 2012   #22

Windows 7 64bit

WOW I forgot that primary partition! Now it boots! Yes!
Small problem. Its asking for the product key and I left it at home. If I reboot to put in key when I get home will it resume the win 7 install progress or possibility trash it? Thanks.
My System SpecsSystem Spec
21 Nov 2012   #23

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64

It should be fine if you enter the product key.

The product key is only good for that machine of course.

If you attach it to another machine and boot up - it will complain.
My System SpecsSystem Spec

17 May 2014   #24
Mark Phelps

Win7 Pro 32-bit, Win8 Pro 32-bit

Quote   Quote: Originally Posted by snehalmasne View Post
If you want to use two operating systems on the same computer, you have a couple of options. The first is to simply create another partition on the hard drive, while the other is to use an external hard drive. The latter is the easier option and requires only that you change the correct settings to install the second operating system on your external hard drive.
Did you even bother to read the title of this thread? It specifically mentions Windows 7 -- and your own article says that Windows is difficult to install to an external drive. In fact, from my experience, if you boot from a Win7 DVD and point it to an external drive, it will refuse to install it there.
My System SpecsSystem Spec

 How to install windows 7 to usb external hard drive

Thread Tools

Similar help and support threads
Thread Forum
Install windows 7 on USB external hard drive
I am trying to install windows 7 on an usb attached external hard drive, into a secondary partition. I've tryed installing from an ISO file mounted as a virtual drive, by extracting the files and running the setup file and by booting from the ISO file of a DVD/DR disc. I choose custom install and...
Installation & Setup
Install Windows 7 on external hard drive using Bootcamp
How can I install Windows 7 on my external hard drive using Bootcamp on my Mac? Do not say it would be slow. I installed Mac OS X on it and it works just as fast as on my internal drive and there are no problems at all.
Installation & Setup
BSOD HDD Failed - Install Windows 7 on external hard drive from boot
Hello everyone, I am new to the forums and not sure where the best place to ask this question is, any help would be appreciated, even if you refer me to somewhere else. I have a Dell Inspiron 1545 (2.5 years old). All my data is backed up so I have no concerns about recoverying data. First,...
General Discussion
How can i make/install windows 7 using my external hard drive ?
Hello I hope im not making a mistake here but would like to know how can i install windows 7 using my external hard drive using this... How To make Bootable USB without encountering this STOP: 0X0000007B i mean i will use my external hard drive as bootable usb to install windows 7 on my...
Installation & Setup
install 7 on external hard drive?
i've an empty external hard drive, and i don't know what to do with it... so, i'm thinking of installing windows 7 in it. so, i can use it on multiple computer (same hard drive, same OS, on different pc)... does it possible?
Installation & Setup

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 06:26.
Twitter Facebook Google+