As it is the last chance to upgrade to Windows 10 free, more and more Windows 7/8.1 users choose to upgrade to Windows 10. However, the upgrade may fail with the following error message: “We couldn’t update the system reserved partition”. (see the picture below)
What does this error message mean? And how can we fix this issue?
“We couldn’t update the system reserved partition” error is usually caused by insufficient space on the System Reserved partition. Nowadays, when you install Windows to an MBR disk, Windows will create an additional hidden partition labeled as System Reserved, which stores important boot files and normally locates before the system partition (often known as C: drive). System reserved partition often occupied 100MB in Windows 7, 350MB on Windows 8, and 500MB on Windows 10.
If you pay attention to those figures, you will probably find out the reason that caused Windows 10 upgrade failure. Since upgrading to Windows 10 needs more space on the System Reserved partition than Windows 7/8 requires, Windows 10 will not upgrade unless it detects enough space on that System Reserved partition.
To solve this issue, what you need to do is to expand the System Reserved partition. First of all we need to point out that even though Disk Management is always helpful, this time it is proved to be useless, as we said that System Reserved partition is often followed by system partition, instead of unallocated space. Extend Volume is greyed out in this case.
Thus, you can increase the size of System Reserved partition using third party partition software like Free MiniTool Partition Wizard, which can manage your disks and partitions without data loss.
Tutorials on how to increase system reserved partition:
1. Download free partition magic. Install and run it.
2. Right-click on System Reserved partition and select “Extend Partition“. Here we take partition F: for example, and our aim is to take some space from F: partition and add it to System Reserved partition. In the pop-out window, drag the slider bar rightward to decide how much space we need from F: partition.
3. Click Apply to execute the process. Please note this operation needs restart to be finished since we are change the partition size of system related partition. You can also create a bootable media with MiniTool Partition Wizard Bootable CD to complete the process.
When your machine is restarted, you can see the System Reserved partition has been expanded. Then you should be able to upgrade Windows 7/8.1 to Windows 10 without receiving “we couldn’t update the system reserved partition” error. Please seize the limited time to do the upgrading.