win7 failed to start changing hardware or software

1. Start WinPE with a CD or U disk and enter the command prompt

2. Enter "cd \windows\system32" and press Enter

3. Enter "bcdedit" and press Enter

4. Please pay attention to the "unknow" part above, we need bcdedit to modify it

5. My system XP is installed on the C drive , Win7 is installed on drive E. Please enter the following command according to the actual situation of your system:

bcdedit /set {bootmgr} device partition=C:
bcdedit /set {ntldr} device partition=C:
bcdedit /set {default} device partition=E:
bcdedit /set {default} osdevice partition=E:
重新启动电脑！

win7 32-bit: Start using WinPE, run CMD (command line mode), in the C:\windows\system32 directory , run the following three commands:

bcdedit /set {default} osdevice 
bootbcdedit /set {default} device 
bootbcdedit /set {default} detecthal 1

Recommended tutorial: windows tutorial

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