Lenovo ideapad D330 User Manual page 26

I uninstalled a preinstalled software, but there is no significant increase in the free drive space.
The copy of Windows running on your computer may be Compact technology enabled. For computers with
Compact technology enabled Windows, the majority of files needed for preinstalled software are installed on
the Recovery Partition and won't be deleted through normal uninstallation.
What happens if I attempt to delete or modify the Recovery Partition?
Attention: Do not delete or modify the Recovery Partition on a Compact technology enabled computer.
If the Recovery Partition is deleted or modified, you may not be able to restore Windows to the factory status.
For computer models on which Compact technology is enabled, deleting the Recovery Partition may cause
Windows to fail to start.
How can I determine whether the Windows running on my computer is Compact technology enabled?
Compact technology is normally enabled on copies of Windows 10 Update running on SSD (or eMMC) -only
computer models. To check your computer,
1. Right-click the Start button in the lower-left corner and select Disk Management.
2. The Disk Management program starts.
If Wim Boot is labeled on the Windows partition (as illustrated), Compact technology is enabled on your
copy of Windows.
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User Guide