As an exercise I installed Raspberry Pi OS to a laptop, as detailed in link below

https://projects.raspberrypi.org/en/...rry-pi-desktop

It is the only system on the hard drive.
It runs ok but is very slow to boot up.
Like about five minutes, compared to windows 10 at one minute.
I have re-installed it, but it remains the same.
Anyone else tried this out.