I do use CCleaner & Wise but
Check these areas
1. shell:startup
2. shell:common startup
regedit
3. Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
4. Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
5. Ctl+Sft+Esc opens Task Manager check startup
6. Task Scheduler library
7. appwiz.cpl
8. windows features
Not convinced this is useful for me . . .
Debloat open Powershell admin
iex ((New-Object System.Net.WebClient).DownloadString('https://git.io/JJ8R4'))