Scenario
“I have a laptop with Windows 7 installed. Today it suddenly froze while I was
working. So I turned off it, but when I tried to turn it on, it doesn’t work. How to
repair Windows 7 from another computer? Any suggestions would be appreciated in
advance!”
The cause of Windows corrupted
If you encounter the problem that the computer cannot boot successfully or receive
error message like Windows Boot Manager Boot Failed. You may be puzzled about why
Windows corrupted. The common reason are as follows:
1. Switching the machine incorrectly, or the voltage is
unstable (such as frequent forced shutdown, no UPS, etc.)
2. The hard disk is subject to vibration when reading and
writing data, especially strong vibration.
3. Frequently compressing the hard disk.
4. The hard disk is not well cooled, resulting in too high
a temperature during operation.
5. The usage environment is too bad.
If your Windows is corrupted, you have to repair MBR for your Windows. Don’t know how
to do this operation? Look through the following part to find the answer.
How to repair Windows?
If you want to repair Windows, you can try the following solutions to complete this
operation.
Solution 1. Windows built-in tool
Windows provide users a built-in tool - bootrec.exe.tool. You can use it to repair
the MBR if you encounter the problem Windows boot failed. The specific steps are
below:
1. Press F8 to go to the Windows Recovery Menu while
booting Windows 10 system.
2. After that, choose “Troubleshoot” > “Advanced
options” to get into “Automatic Repair” menu.
3. Then, click command prompt to use Bootrec.exe tool. And
input the following commands, and run them one by one:
bootrec /RebuildBcd
bootrec /fixMbr
bootrec /fixboot
bootsect /nt60 SYS or bootsect /nt60 ALL
Solution 2. Repair windows with another computer
If you are not familiar with the command prompt, you can turn to a third party
software to repair Windows with another computer. Here I highly recommend you AOMEI Partition Assistant - a
magical third party partition manager which provides you many powerful functions
like Make Bootable Media and Rebuild MBR. You can download this tool in a normally
working computer, and create a WinPE bootable media to boot up your corrupted PC,
then rebuild MBR easily in Windows 10/8/7, Windows XP, as well as Windows Vista. The
following example will show you the specific steps of repairing Windows 10 with
another computer:
First of all, connect a blank USB to a working computer and make sure it can be
detected.
Step 1. Download, install and run
AOMEI Partition Assistant, click “Make Bootable Media” at the left side bar. And
click “Next” to continue.

Step 2. In the pop-up window, select “USB Boot Device” and click
“Proceed”.

After that, boot your corrupted Windows 10 Computer from the bootable media. AOMEI
Partition Assistant will automatic run on the desktop then.
Step 3. Right click the system disk and select “Rebuild MBR”.

Step 4. In the next window, set the type of MBR for the current OS.
(Choose a proper MBR type according to your operating system.) Then click “OK”.

Step 5. After that, click “Apply” on the toolbar to commit Rebuild
MBR operation.
Till now, you can successfully repair Windows with another computer. Besides Create
Bootable Media and Rebuild MBR, AOMEI Partition Assistant also provides you many
other powerful functions like Resize/Delete/Create Partition, Partition Copy, Disk
Copy, Migrate OS to SSD and so on. If you want to format the file system of USB, AOMEI Partition Assistant can help you too. If you want to enjoy
more advanced functions like Allocated Free
Space or , you can upgrade to AOMEI
Partition Assistant.