my ip address comes out from a different ISP/Country
I noticed suddenly something weird on my PC. I am currently in Italy, Google all of a sudden is displayed in Arabic, and my IP is from an ISP in Czech Republic, and it is obviously different from the Italian ISP I am connected to.
In my phone with only WIFI enabled and mobile data disabled, I can see that the IP assigned is from the correct ISP. I run a test from speedtest.net, and I see the Czech IP. The same IP is displayed double checking from whatismyip.com.
Chrome sometimes hangs with the error ERR_PROXY_CONNECTION_FAILED, but I do not have a proxy set.
My phone when it is connected to the same wifi correctly shows the Italian ISP. When I use my phone as hotspot using the mobile carrier instead, when I do a speed test the ISP is the correct one from my mobile carrier, but the Ookla server assigns a Czech server as the closest one. All other devices in my premises (PCs, phones, tablets) correctly display the address, so maybe this would rule out possible router hijacking. I ran a scan with my antivirus and nothing relevant came back.
Any other ideas of what to look for or what it could be?
... Chrome sometimes hangs with the error ERR_PROXY_CONNECTION_FAILED, but I do not have a proxy set...
This error is only produced if a proxy is set. It might be that some software or browser extension you installed is setting the proxy even if you don't expect this. This might be malicious behavior but it might also be innocent for the kind of software/extension. If nothing is supposed to do this consider your system compromised.