Hi,
I’m glad that CCleaner seemed to have helped.
Can I also recommend you investigate how the TRIM function for your SSD operates. TRIM tidies-up and deletes files to keep everything working sweetly. Sometimes, you have to log-off from Windows itself, and leave your PC at the log-in screen for it to operate. Other controllers/drives use a wiper.exe program for it to work.
Check out some forums for TRIM and garbage collection for your specific SSD.
Neil.