Hi neelin2, Since it is your Windows Folder that is taking up your space, I suspect it is a file called CBS.log that might be the issue.
In Windows File Explorer, navigate to C:\Windows\Logs\CBS
What size is CBS.log?
If CBS.log is huge (many GB's) here is the Fix:
Click your Start Button, type services and hit Enter to open the Services app
Scroll down to find the Windows Modules Installer service and double-click on it
Set its startup type to Manual
Restart your System
Then open Windows File Explorer
Go to C:\Windows\Logs\CBS
Delete all of the files in the CBS folder
Restart your PC
Then go back into the Services App and set Windows Modules Installer Service back to Automatic Startup