Can I not surf at all with a notebook without anti-virus software or just download anything?

How close is that?

Have a notebook that I use as a reserve and has no virus protection program. May I not surf with it at all. What could happen there?

You have a Windows without anti-virus program? I would say it's older than Windows XP.

At Win10, the effort to disable the protection and click away the messages would be illogical somewhere.

Of course you can surf with it! Legal regulations regarding virus protection programs do not exist. You can surf and download the thing as you are deliciously funny. You just have to be clear that you have to be careful…

By the way: If ud Windows use you have a virus protection with it. He calls himself "Windows Defender". This is the small quartered sign in the system tray

No, I have Win7 on it but no extra virus protection program.

Win 7 on the notebook… Why?

Then you own Windows Defender. You should call it more often and scan your PC

Surf and download for years without virus protection, but have Mac OS.

Surely you can surf and download without virus protection, nowhere is there a law that you need to have such protection.

Win7 has an in-house (if bad) virus protection program preinstalled.