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Computer originally installed CentOS system, because there are a lot of unallocated disk capacity, in the undistributed creates an empty tray, and installed Windows 7 system,
After the installation is complete, has been unable to enter the system choice, again turned on the computer power boot into the Windows 7 system,
Is dell laptop name-brand computer
To solve, thank you!

CodePudding user response:

Boot long press the esc key can select the startup

CodePudding user response:

Is the BIOS or grub residence time is too short lead to guide page, this time can be set,

CodePudding user response:

refer to the second floor zhgure response:

is the BIOS or grub residence time is too short lead to guide page, this time can be set,

First of all thank you for your reply and guidance,
Already know the reason, because when I install Linux, with instructions to force the use of a GPT disk partition method but Windows8.1 the following version cannot be without a special method under the condition of normal into the system boot, only using the system boot Ubuntu, but my computer did not install Ubuntu environment, so it is impossible for grub boot system choice, has been solved, my solution is a bit rough,
Reinstall Linux, the use of MBR disk partition method, so it can after install Windows, Linux installer to grub repair, perfect operating system boot boot after