@Pete-S said in laptop slow after installing Spectre/Meltdown mitigations:

Wasn't the bios also involved in these mitigations?

In so much as a micro-code patches for the processors are concerned - yes. My processor is updated to the most current, Oct 2019. Doesn't matter - performance still sucks!

I applied these reg changes, rebooted - then applied a script I've done many times before. It was amazing how slow the script ran compared to other machines. I took a video, I'll see about posting it later.