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Hi，
I am a grean-hand，I have a question about msr：when i reboot the computer，will The MSR register reset？or not？，if i write some infomation to the msr register ，when the cpu reboot ，I need rewrite？
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You should assume that all MSRs will be reset to default values on a reboot -- whether it is done by the hardware, by the BIOS, or by the OS.
It is conceivable that there might be an exception, but I can't think of one.
