fan setting on laptop and 64 bit option

I’m just looking for some advice on a old laptop that I recently acquired. It is a Compaq Presario CQ70 Notebook. I was noticing in the BIOS settings that there is an option to enable “Fan Always On”.
I am wondering if it is best to enable this so that the fan is always on. It was enabled when I got the laptop.
Or, is it better to have the fan just come on when needed.

Second question: It has Vista 32 bit. I am wanting to but linux 64 bit on it. How can I tell if the system will run a 64 bit operating system?

Thanks

Look at System in Control panel it should tell you if it is 64 or 32 bit.
Since it’s running Vista 32 bit, it’s probably a 32 bit system.

This is the fan that runs all the time when my system is on.

https://screencast-o-matic.com/screenshots/u/Lh/1550238604575-68951.png

I personally wouldn’t let the fan on the laptop run constantly.

+1

It says “32-bit Operating System”

http://www.hp.com/ctg/Manual/c01573159.pdf

Thank you for all the help.