Boot Windows 7 from USB. Computer not starting?

You should always have your data backed up to at least two external media destinations (external hard drive, DVDs, flash drive) in case of system file corruption and/or hard drive failure

You can not do a Repair Upgrade Install of the operating system when booting from a Windows 7 Bootable USB.

That is dome from within an up and running Windows 7.

You can only do a Startup Repair, etc. when you boot from the disk; otherwise you can clean install 7 with it.

These are your Repair choices:

You should now click on the Repair your computer option to start entering the Windows 7 Recovery Environment.

Which leads to these options, including Startup Repair, etc..

Cheers.

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Are you seeing this 0x0000007B error when you try to boot from the installed Windows?

Depending on what the rest of the message says sometimes that is a symptom of a misconfigured hard drive interface in the computer BIOS on your system of unspecified make and model where the system does not understand the interface to the hard drive - this can happen if the CMOS battery has gone flat and the BIOS has somehow reverted back to some default and incorrect settings.

I think I would work on figuring out why the system will not boot (fix the 0x0000007B problem) and fix that first.  No amount of repair attempts are likely to fix that problem.

Here are some ideas accumulated over the years of things you can look into:

It sounds like you need to enter the BIOS on your system by pressing the "Del", F2, F10 or F12 key (whatever key is right for your system), locate the section where the hard disks types and hard disk interfaces are configured and temporarily change the setting so the Windows is able to find the hard disk.

Where to find the adjustment and how to change it depends on your system manufacturer and BIOS version so you may end up having to just look around for it and do a little experimenting.  If you know your system make and model, we can probably help you find a manual.

You need to locate and change the interface mode for your primary hard disk in the BIOS so that when the Windows Setup loads, it will be able to locate the hard disk. 

Before making any adjustments, you should make a note of what the current BIOS settings are so you can change them back when you are finished.

The adjustment varies so here are some examples I have accumulated:

The adjustment is made in the BIOS and could be under Integrated Peripherals, SATA Device Configuration, SATA Mode or something similar.

Make a note of what the current settings are before making any changes so you can change them back when you get done or if things get worse.

After you make the changes, save them and see how things look.  You may have to try a few things to get it to behave.

If you find the mode is set to RAID/SATA mode, change the mode to IDE.

If you find the mode is set to SATA, change the mode to IDE.

(Acer Aspire)

If you find the mode is set to SATA, disable SATA mode.

If you find the mode is set to AHCI, change the mode to ATA.

If you find the mode is set to AHCI Emulation Mode, change the mode to IDE Emulation.

If you find the mode is set to SATA, disable SATA mode and/or change the mode to ATA.

If you find the mode is set to SATA Native Mode, disable SATA Native Mode.

If you find the mode is set to RAID/Autodetect AHCI, change the mode to Combination.

If you find the mode is set to RAID Auto/AHCI, change it to RAID Auto/ATA (this was a Dell XPS 420)

On some system of unknown make and model, In the Integrated Peripherals menu, disable" On Chip IDE Channel 0 

On an Acer Aspire 4720Z the mode needed to be changed from "AHCI Mode" to "IDE Mode"

The WWW says this works on some Dells:  "I had to set my SATA Operation to ATA instead of AHCI"