Avast product/or something just appeared on my network, explaination, please

Hi folks, I do not have any Avast products installed on my PC. A few minutes ago this appeared,
IP: 91.213.143.4
Hostname: ftp.avast.com
ISP: AVAST Software s.r.o.
Organization: AVAST Software s.r.o.
City: Prague
Region: Hlavni Mesto Praha
Country: Czech Republic
Timezone: Europe/Prague

What is it and why is it on my PC, Avast seems unwilling to answer to answer, maybe you all can help?

Have you installed / updated CCleaner ?

https://press.avast.com/avast-acquires-piriform-maker-of-ccleaner
https://blog.avast.com/welcome-piriform-to-avast