What are /r/oldpc's favorite Products & Services?

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As your PC does not have SSE2, it means you have an Pentium III or worse. These CPUs are to slow for modern Systems, even a light Linux. Even Linux specialized on old PCs like Antix does not have support for these CPUs since its 2015 release https://antixlinux.com/ because you likely need a non pae version.

If your father doesn't want to spend much money, maybe you can persuade him to use a Raspberry Pi 4? It will pay for itsself in a year because of the much lower electrical bill.