Avast and new clean install of Windows?

Avast Free Antivirus / Premium Security
1

I want to make a completely clean install of Windows 10 on my computer. Am I able to use my current licenses after everything is deleted? Do I have to keep any kind of Files? How do I activate my licenses on the new install?

2
Am I able to use my current licenses after everything is deleted?
Yes
Do I have to keep any kind of Files?
No
How do I activate my licenses on the new install?
Same as you did with the current installation.
3

Alright thank you!

4

how to make clean install ?

5

mostafa,

a clean installation of what ?