Websites are not working on Windows systems

[matteo]

Check Rules, as it seems someone has been accessing Cloudflare accounts, via the credentials I suppose.

A NewBrowser.rar file downloaded when web address is put on browser

It’s not the first case I have seen. Can you please check if there are Page Rules, Workers, etc. acting somewhere? Check audit logs for when and who did this. I am 99.9% sure someone got your credentials and accessed your account. Change your passwords, now.