Geo wrote:

I was unaware that any ISP could decide which operating system you computer
could use - how do they do this?

A few ways of sorts:

By bundling access hardware that only comes with Windows and sometimes
Mac drivers.

By only offering tech support on platforms they support.

And/Or by doing something like AOL used to do where you had to run their
bespoke client software to even connect (they used to establish a VPN
connection over the top of the basic ADSL PPPoA one - again the client
software was Windows and possibly mac specific)

Most of these are circumventable with your own hardware if you can cope
without tech support.

--
Cheers,

John.

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