Step 1 - Go to "This PC"

Go to "this PC" & check the Windows (C:) to see your memory allocation

Step 2 - Check the windows.edb file

Check if the windows.edb file is not too heavy.

Go to C:\programdata\Microsoft → Search → Data → Application → Windows

If the file have a regular size like on the screen shot go to step 3.

Step 3 - Download TreeSize Free

Check what folders are taking too much space on you disk with TreeSize Free

https://www.jam-software.com/treesize_free

Once downloaded start an anlysis of your "Disk C"

Step 4 - Free Space

Clean the files that are too heavy on your disk

Then go back to This PC and see how much memory you got back