Boot errors can appear exactly when you expect less, and Windows 7 It is not exempt from such errors. For those who have not yet tried, we tell you that if you install Windows XP on one PC You already have Windows 7 installed, OS older (ie Xp) will completely delete Boot Loader for Windows 7 FROM MBR. If you have no idea how to repair this, it does not mean that it cannot be repaired. And if you want to install in dual-boot Windows 7 si Windows XP, and on your PC you have already installed Windows 7, you will not have to reinstall both operating systems, because there are some very simple methods of solving boot problems. Obviously, it is not necessary to be in the situation described above, but simply something does not work properly (we all suffer at a time) and there are boot errors (like "BOOTMGR is missing”).
To be able to repair Windows 7 boot errors you need to have a Installation DVD with this operating system. Give a PC restart to be able to boot from DVD. In the left-hand corner of the installation screen you have the option Repair your Computer (Keep in mind that this is only available if you boot from the installation DVD, not if you boot directly from a installation image mounted in a virtual DVD-ROM).
Click on the repair option, then select the Windows you want to repair (in the dual boot case, take great care at this step) and click on Next.
1. In System Recovery Options, select Startup Repair,
Then wait until the verdict is given (you will most likely wait a few good minutes). If at the end of the expectation a message will appear in which you will tell you that Startup Repair could not repair windows problems (or something similar), then try the following method.
2. Also in the System Recovery Options, browse the window and click on Command Prompt.
In the window cmd Open, write the order booterec /? And give Enter. All orders will be displayed for booterec, next to which it is briefly explained what are the problems they solve.
For example, if you want to Repair the MBR (Master Boot Record), write the order bootrec /fixmbr, and if you want to create a new boot sector on the system partition (usually this is the method of solving the "bootmgr" errors), use the command bootrec /fixboot etc.
To replace bootloader-ul Windows XP With the Windows 7 bootload (valid for cases in which the Windows 7 bootload is completely Stars from the installation of an XP on the same PC), open a prompt command through Startup Repair (so with the installation DVD), then write the order bootsect /nt60 all (Depending on the partition you installed the XP, you will most likely have to be replaced. "all"With the letter of the respective partition).
Then to bring the XP bootloader back to the boot menu (in MBR), open a cmd in Windows 7 If you taste command bcdedit /create {ntldr} -d “Windows XP”.
Note: Most boot problems can be solved in this way, but we do not guarantee success regardless of the case underlying the problem (for example, boot problems can also arise due to viruses, in which case this tutorial does not use, but you need a CD rescue).
*This tutorial is also valid for Wndows Vista.
