In response to your first question, what exactly do you mean? I use Windows (for work) and it reopens application windows if you restart/shutdown with them. But if you close word and reopen it, it doesn't start off from where you left.
I normally stand shoulder to shoulder with fellow RAM scroungers, but I have to say 1GB is taking the biscuit!
How on earth did it run Windows 10?
Anyway, you will find a lot of Linux OS that can run on less than 1GB, but some of them might not be the most user friendly, and...
The least resource hungry would be something without a DE, but presumably you are looking for something with a GUI. Is it your first time setting up Linux and/or installing an OS?
Do you want to boot from USB in a live OS, or install from a USB to your hard disk?
I might be wrong, but I don't think you can install appimages. I have a couple which I just run. In Lubuntu, I just went into file properties and clicked "make this file executable". I presume you'd need to do similar on other distros.
I think you could easily install the package as well (if...
I have solved the issue. Rather embarrassingly it was due to the fact I was keying the incorrect password. I realised when I tried to log in to his router and I again misread the start of the long number that is his password.
It seems I have a thing in my brain that wants "3354" to become "3345"
I had to replace one of those little batteries about 20 years ago as my PC wouldn't remember the time. I suppose it wouldn't have affected me as I was just booting off HDD, but presumably the BIOS in such cases reverts to default and stores no changes?
As per the manual posted by @stan, and assuming I am reading it correctly, the default bios settings do not use USB at all. USB can be used though.
You can override the default settings by holding some down keys on boot.
To change the default boot device you need to hold down F12 when...