Can I safely delete folder $GetCurrent in Windows 10?
Yes.
What Is $GetCurrent?
The $GetCurrent directory is created during the upgrade process. It
contains log files about that last Windows upgrade process and may
also contain the installation files for that update. On our system,
the $GetCurrent folder took up 3.38 gigabytes after upgrading to the
Creators Update. This is because the folder contains leftover Windows
Update installation files.
Assuming you don’t need to review the log files stored here and you’ve
finished installing the latest Windows Update, this folder is safe to
remove. In theory, Windows should automatically delete these files
itself after 30 days at most. In practice, we noticed that this folder
was still lying around more than a month after upgrading to the
Creators Update, so we had to delete it ourselves.
However, contrary to popular belief, the built-in Disk Cleanup utility won't delete it:
The Windows Disk Cleanup tool doesn’t automatically delete these
folders. However, it does delete the $WINDOWS.~BT and ~WINDOWS.~WS
folders you may also see in your C: drive.
To get rid of these folders, you can just delete them the old
fashioned way. Select the folders in File Explorer, right-click them,
and select “Delete”. File Explorer will prompt you to provide
administrator permission to delete them, and you can then empty your
Recycle Bin to free up the space they take on your device.
Deleting these folders won’t cause any problems if you don’t need to
review the log files they contain and if you aren’t in the middle of
installing a new update to Windows. Even if Windows does need the
files to install an update, it will just download them again.
Source: What Are the $GetCurrent and $SysReset Folders, and Can You Delete Them?