¨ISP Blocked¨ on laptop, can´t post

I used to get this message on my PC, but it stopped after I changed my computer, I suppose my IP changed in the process somehow? (I have static IP)
Anyway, I´m getting it on my new laptop and can´t post on any board.
I assume my wifi IP falls on the range of blocked IPs.
Is there any way to change the IP I get on this laptop or any other solution for this?
Thanks.

You can move to China and find out that all ISPs are blocked, then what? Huh?

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