Windows 7 Startup Repair Disk

Posted on  by admin

Repair your computer and protect your data:. If you have Windows 7 boot problems, the boot sector or master boot record on your system partition may be damaged, corrupted, or has missing files. And you will receive an error message like the following before Windows actually begins to load.

  1. Missing operating system. Reboot and select proper boot device. Invalid partition table. Bootmgr is missing. FATAL: No bootable medium found!

  2. Then, what are the boot sector and master boot record exactly? The boot sector is a small section at the beginning of a hard drive. It's created when you format the hard drive.

The boot sector contains some code and data that helps BIOS hand off the startup process to Windows. It also hosts the Master Boot Record (MBR), which contains the disk signature, partition table for the disk, and a small bit of code called the master boot code.

  1. When a PC starts, the BIOS will load the master boot code into the PC's RAM.

  2. Then it will scan the partition table, determine the active partition, load a copy of the boot sector into the PC's RAM, and hand off the startup process.

  3. If you backup MBR in advance, you can use it to restore your computer and make it work as normal.

    • If not, you can see the next part and learn to repair boot with command prompt in Windows 7. If your boot sector or MBR runs into problems, you cannot start Windows normally.

  4. That's to say, you need the Windows installation disc to boot your computer.

  5. If you don't have, you can create system repair disc or recovery disk on a working computer.

Then, let's start with detailed steps below. Create Windows 7 installation media on a working computer.

You can download ISO image files from Microsoft Store and burn the ISO image files to a USB drive or CD/DVD via Windows 7 USB DVD download tool.

Plug the USB drive into your computer. Start your computer and press the corresponding key to go to BIOS.

  • Set boot priority to your drive in the Boot option.

  • Save changes and restart your computer. Then, you will see a black screen with error message like "Press any key to boot from CD or DVD.." , just press a key in the keyboard. After that, it will start to load files, wait patiently.

After that, you will go to the Install Windows screen, click Repair your computer. Select the operating system Windows 7 in the System Recovery Options window and click Next.

  1. Sometimes, you will not see any operating system in this window, please click Load Drivers to install drivers for your disks.

  2. Select Startup Repair in the System Recovery Options and it will automatically start to repair boot sector or MBR in Windows 7.

  3. Just wait patiently until the process is completed and click Finish.

  4. When you try to manually run Startup Repair using installation disc, you may find startup repair not working sometimes and ask you to restore your computer with System Restore.

  5. Click Restore if you have a working restore point.

If not, click Cancel. Then, you will see the Windows cannot repair your computer automatically screen with 2 options at the lower location, select "View advanced options for system recovery and support". After that, you will go back to the System Recovery Options window and select Command Prompt to boot repair Windows 7.

Also, if you don't want to perform Startup Repair, you can still open the command prompt window by pressing "Shift + F10" in the first Install Windows screen. Then, it will automatically pop up.

Wait a minute, please try Windows 7 startup repair command prompt chkdsk to scan the integrity of your file system and hard drive so as to rule out the physical problem of hard drive. Because it can also damage the boot sector and MBR. Then, try other command lines below. In the command prompt window, type the following command line and hit Enter after each one.

bootrec /fixmbr . bootrec /fixboot. bootrec /scannos. bootrec /rebuildbcd. bootsect.exe /nt60 all /force. Notes: ❤ The option /fixmbr is to fix MBR in Windows 7.❤ The option /fixboot is to repair boot sector in Windows 7.❤ The option /scannos is to fix bootmgr is missing in Windows 7 command prompt.❤ The option /rebuildbcd is to rebuild your BCD and get the missing Windows installations back.❤ The bootsect.exe /nt60 all /force is to rebuild the boot sector for Windows.

  1. Among them: >> The /nt60 parameter applies the master boot code that is compatible with BOOTMGR.

  2. The /all argument updates the master boot code on all partitions.>> The /force parameter forcibly dismounts the volume(s) during the boot code update so that the Bootsect.exe tool does not gain exclusive volume access. Exit the command prompt window and restart your computer. If the bootrec /fixmbr and bootrec /fixboot don’t work, you can try to restore the boot sector code of your Windows 7 with steps below.

  3. In the command prompt window, type the following command line in order and then hit Enter. bootsect /nt60 SYS /mbr. Notes: ❤ The command line from diskpart to list volume is to find the drive letter of your installation disc.

  4. Please check the “Type” column which contains the word “CD-ROM”, here take D: as an example.❤ The command line bootsect /nt60 SYS /mbr is to restore boot sector code using installation disc.

  5. Remove the installation disc and restart your computer.

  6. If the above command prompt does not work for you, you still can try to backup and rename BCD first and then rebuild it via CMD.