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Windows 7: 100MB System Reserved in Windows 7

22 Aug 2010   #31
Microsoft MVP


To reiterate, if you format using the Installer's "Drive options (advanced)" then it will issue the 100mb SysReserved partition.

If you have a blank HD and do nothing with "Drive options," it will likely issue the 100mb Sys Reserved partition, since it auto-creates and auto-formats the partition if you do not.

Only if you have already an pre-partitioned HD or are installing to a pre-formatted partition does installer not issue the 100mb SysReserved partition.

To avoid it on the fly during install if it is issued: simply delete the partition given to install Win7, click on 100mb given for SysReserved partition to expand it to the size you want Win7 to be, format it, Install there.

My System SpecsSystem Spec
23 Aug 2010   #32

Window's 7 Ultimate 64bit

I have installed windows 7 Ultimate on 4 systems and on two of then I selected advance format and they don't have the 100mb reserve partition, but the other two installs i didn't choose the advance format option and they have the 100mb partition on those two systems all installs were on new drives.

I guess it is better to leave those 100mb partitions alone and avoid a boot problem.
My System SpecsSystem Spec

 100MB System Reserved in Windows 7

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