How do I choose to start a dual-system server?

my server has Windows Server 2008 and CentOS7.2 installed on a disk.

I restart my computer now and it automatically starts CentOS7.2. How can I choose to start them, such as if I want to start Windows Server 2008?

Operation-and-maintenance linux windows
Apr.22,2022

does the startup manager come with grub or windows?

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e3f10d-447f6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e3f10d-447f6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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