Question: My computer originally had Windows XP and Windows 7 dual systems installed. After the XP system crashed, I directly formatted the C drive and reinstalled it. As a result, I can no longer enter Win 7. There is an image file of Windows 7 installation CD in my hard disk. How should I repair it?
Answer: First, restore the Win 7 startup manager. Enter XP and use a virtual optical drive (such as Daemon Tools) to load the Win 7 disc image file. Enter "cmd" in "Start → Run" and run to open the command prompt window, and then enter the following command:
h:
cd boot
bootsect /nt60 SYS
Where "h:" is the letter of your virtual optical drive. In this way, the Win 7 boot manager is restored and the XP boot manager is deleted. Next, you need to enter Win 7 to create a startup menu for XP, so that all operations are completed.
Click "Start→Programs→Accessories", then right-click the "Command Prompt" in the attachment, select "Run as administrator", and then type the following commands to manually create a startup entry for XP:
Bcdedit create {ntldr} –d "<Windows XP>"
Bcdedit set {ntldr} device partition=c:
Bcdedit set {ntldr} path ntldr
Bcdedit displayorder {ntldr} –addlast
Exit the command prompt after running everything. Use flash memory to copy several hidden system files "Ntldr", "Boot.ini", and "NTDetect.com" (all in the root directory of the system disk) to other Windows XP systems, and then copy them to drive C where XP is installed on this machine. in the root directory of the disk. After the files are copied, right-click "My Computer→Properties→Advanced System Settings", click "Settings" under "Startup and Recovery", and you can see an extra "Default Operating System" in the menu Earlier versions of Windows". Here you can set the default startup system and set the selection time. After the settings are completed, restart the computer and you will find that the familiar XP startup menu has appeared!
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