CCleaner Lite

Is there a lite version of CCleaner that just scans and removes and does not do real-time monitoring?

I have several monitoring things installed already (Windows Defender, Avast Antivirus, WinPatrol) but like how CCleaner works. Having CCleaner installed too makes my Windows 10 very slow.

No. However the closest thing would be to use the Portable ZIP version. The Portable version does not have Smart Cleaning (formerly called Monitoring) enabled and it cannot be enabled.

The free version is what you want.

I just installed a new firewall and the free version calls home.