When you install Windows on a laptop or desktop, it creates a small reserved drive. You never have to intervene or specify how big or small this drive ought to be. Usually, it’s just 500MB, or less but it’s essential. If you use an SSD instead of an HDD, you may not see the reserved drive but it’s there. It seems that after the Windows 10 1803 update the reserved partition is appearing when you go to This PC and Windows 10 is now warning you that you’re running out of space on the reserved drive. You can make it stop if you hide the reserved drive.
Hide Reserved Drive
Hiding a reserve drive is really easy and the tool needed to do it is built into in Windows.
You can hide the reserved drive from the Command Prompt, or using Disk Management. In either case, you need administrative rights.
Open Command Prompt with administrative rights. Enter the following command;
Next, enter this command;
This will list all drives, assigned and unassigned on your system. You can check in This PC what the drive letter is for the reserved drive but the information the List volume command gives you is reliable. It will also tell you which drive is the reserved drive.
The reserved drive should be assigned a letter. Take note of the letter it is assigned and enter the following command. Replace the letter X with the letter of the reserved drive the List Volume command gave you.
In Windows Search, type Disk Management. You will get a Control Panel result for creating and formatting hard drive (and SSD) partitions. Select it.
Disk Management is really just a graphical interface for doing the exact same thing you did in Command Prompt in the previous section. Look for the reserved drive, and right-click it. From the context menu, select ‘Change Drive Letter and Paths…’. The drive in the screenshot below is NOT the reserved drive. The screenshot only illustrates the option form the context menu that you need to click.
Another smaller window will open where you need to click the ‘Remove’ option. This will not delete data from the drive. It will still be there and Windows will be able to use it whenever it needs to. It will simply remove the assigned letter so that the drive is no longer visible in This PC and Windows 10 doesn’t prompt you to clear up some space in it.
If you do not see a reserved drive in This PC after upgrading to Windows 10 1803, it simply means that whatever bug this is, it isn’t affecting you. Reserved drives are supposed to be hidden so that their content cannot be deleted.