Reparar boot windows 7

After that, it will start to load files, wait patiently. Step 6. After that, you will go to the Install Windows screen, click Repair your computer.

Step 7. Sometimes, you will not see any operating system in this window, please click Load Drivers to install drivers for your disks.

Step 8. Just wait patiently until the process is completed and click Finish. 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.

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.

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.

In the command prompt window, type the following command line in order and then hit Enter. 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.

Step 2. Then, type notepad in the command prompt window. After that, save the change and exit this window. Now, you will go back to the command prompt window.

Type Yes to confirm if you asked. Then, hit Enter. You can try command prompt for Windows 7 boot repair above and see if it works. You never know when your computer will crash or become unbootable, thus it's suggested to backup system with a free backup software like AOMEI Backupper Standard.

Here are some advantages of it. In addition, its advanced edition has more useful features, such as, Event triggers, USB Plug in, differential backup, etc.

It allows you to create portable version of this software and use it on any computer without installing it again. It's very convenient for IT maintenance and support engineers. To backup your computer, you can download the backup software and open it. Then, click Backup , select System Backup and follow on-screen instructions to backup your computer.

Also, you can choose other backup types. Then, when something unexpected happens, you can go to the Restore tab and select the created image to restore system to new hard drive and then boot from it. If you have multiple computers, you could consider using PXE boot tool. If you receive the above mentioned error message, the boot sector or MBR may be corrupted or damaged. If you can repair boot with command prompt in Windows 7, you are very lucky. But, sometimes, you will fail to repair startup issue.

To ensure the security of your data and your computer, you'd better create a system backup or disk backup in advance. Then, you can restore system image or disk image in the event of a disaster. Repair your computer and protect your data: When need to perform Windows 7 boot repair via Command Prompt?

If by chance a problem is detected in one of your Windows installations at this initial stage, the system may also ask you if it can try to repair the problem automatically.

It is up to you if you wish to let the system try to repair itself, but otherwise just select No. Step four: Once you have reached the System Recovery Options screen, as shown below, you will be faced with a list of choices that can aid you in repairing a damaged Windows 7 operating system.

If you wish to try the Startup Repair option first, it is often successful in automatically fixing many different start up issues, but in this article we will be using the Command Prompt option to resolve our problems manually.

So, click Command Prompt to continue. If successful, you should be greeted with the message The operation completed successfully. That's it!

Your Master Boot Record has been repaired. While the above command does fix the MBR, and sometimes that is enough, there still might be an error with the system partition's boot sector and Boot Configuration Data BCD. This might occur if you have tried to install another operating system alongside Windows 7, such as Windows XP. To write a new boot sector, try the following command:.

If you are still faced with your Windows 7 installation not being detected during start up, or if you wish to include more than one operating system choice to your system's boot list, you can try the following command to rebuild your BCD: bootrec. The above command will scan all your disks for other operating systems compatible with Windows 7 and allow you to add them to your system's boot list. Upon purposely changing the active partition on my system drive, I was faced with a BOOTMGR is missing error during my system's start up that prevent Windows from starting.

It is a common mistake to make when playing with partitions on a system drive and it can be a headache to solve if not prepared. To change your active partition back using the Windows 7 recovery disc or Installation DVD, follow the steps below. Step one: Follow steps one to four in the above guide. Step three: Type List Disk now and then press Enter. This command will list all disks attached to your computer and assign them a disk number.

Step four: Type Select Disk x , where x is the number for the disk containing the partition you wish to make active. Press Enter. Step five: Type List Partition and then press Enter. You will now be shown a list of the partitions on the selected disk. Determine which partition you wish to make active. Step six: Type Select Partition x , where x is the number of the partition you wish to make active. Step seven: Now, just type Active and then press Enter. That should be it - the selected partition is now active.

Windows 7 makes it easy to create a System Recovery Disc if you already have Windows 7 installed and running. It only needs to write about to megabytes to the disc, depending on whether your OS is bit or bit, and that should only take a minute. Using a Windows 7 Installation DVD at step seven will also allow you to install Windows 7 via USB, not just recover a damaged system; very useful if you have a netbook!

Step two: Open a command prompt with administrative rights. Step three: After accepting any UAC verification questions, you should now be at the command prompt.

Step four: Type List Disk and then press Enter. Determine which disk number corresponds to your USB flash drive. Step five: Enter the following commands in order, changing the disk number to the disk number listed for your USB drive.

Warning - the following commands will erase everything on your USB drive or the disk you select. Step six: After DiskPart successfully formats the USB drive, which might take a few minutes, you will want to enter the following commands:. There should be two folders and a file in the ISO image that need to be copied.