Is your computer password protected? If so try using that password. however, it's possible your bios also has a password. In my experience, that is something you set yourself, I've never heard of a computer not allowing you into the bios. You might need to contact the manufacturer if this is the case.
As far as the Sandisk USB, I would reformat it. That should wipe out any bloatware that it came with. Formatting it to FAT 32 should work. Check out this tutorial:
https://www.howtogeek.com/howto/linux/cr...-easy-way/
If all this seems beyond your ability, I would seek out someone who can give you some hands-on help. This stuff can be overwhelming for anyone, at any age (by the way I'm 68). We are all so used to windows that Linux seems like it's from another planet!
As far as the Sandisk USB, I would reformat it. That should wipe out any bloatware that it came with. Formatting it to FAT 32 should work. Check out this tutorial:
https://www.howtogeek.com/howto/linux/cr...-easy-way/
If all this seems beyond your ability, I would seek out someone who can give you some hands-on help. This stuff can be overwhelming for anyone, at any age (by the way I'm 68). We are all so used to windows that Linux seems like it's from another planet!