This is quite confusing and frustrating!
I bought a new Lenovo Thinkpad L570 with Windows 10 Pro 64-bit. When it had finished updating Windows etc., I installed Avast Free Antivirus. I did the SmartScan, which said that if I bought Cleanup, it would delete 25GB windows trash. I already own Cleanup Premium, so I cancelled the buying procedure and found a way to key in the activation code for my Avast Cleanup. I started it and did a scan, but now it only found 9GB trash! What happened to the other 16GB trash??
On top of that: According to the Windows partition manager, Cleanup has only deleted about 3-4GB...?
What is wrong here?