Right-click on This PC > select Manage > under Storage > select Disk Management
What do you see for C drive? You may also see number of partitions along with their sizes.
Hi Nagative,
As what S.Sengupta mentioned please check your C partition status in Disk manager first.
Free space of C partition would become smaller because of temp file storage, package installation, program profile and other reasons.
Ways to conserve space on the system volume include the following:
Move the paging file to another volume on the system.
Disable hibernation on the system.
Use the dedicated dump file option to capture memory dump files on another volume on the system.
Clean out all temporary directories and folders by using the Disk Cleanup Wizard (cleanmgr.exe).
Uninstall unused applications or utilities from the installation.
You also could follow the instructions as mentioned in this link to clean Up the WinSxS Folder
https://technet.microsoft.com/en-us/library/dn251565.aspx?f=255&MSPPError=-2147217396
Regards
D. Wu