Thank you, Paloma.
"As for Rufus it is just an alternative method for creating the USB."
Then, there seems to be no sense to try it since the problem is not how the installation media is created.
By the way, I have tested all the USB ports on this PC. They are all the same, i.e., the OS does not read anything plugged into any USB port.
"There is a hardware problem with your computer"
I have a hunch that the SSD where the OS is installed is bad and causing the problem.
:You should test, disconnect everything from the motherboard and after that turn on the computer, and analyze if it will get stuck . . . "
Forgot it entirely. Years ago, learnt this trick. Disconnect all hard drives & start the PC to see whether it boots into BIOS. This is to test whether the problem is caused by hard drive. I disliked this because it scratched my fingers. I, therefore, forgot all about it, psychologically. It really is a hassle.
The last time I took a PC down & changed a hard drive & installed an OS was 8 year ago, it was my Windows 7 Pro. Then, Windows 10 & SSD came on the market. My friends warned me not to monkey on the PCs anymore . . . . but I still tried once in 2015 & had my fingers scratched badly.
My hunch tells me that it is very possible the SSD is bad & causing the problem.
What must I do if I replace the current SSD in my PC with a new one?
I had and still have installation CDs & DVDs of Win XP & Vista & Win 7 (never touched Win 8 & 8.1 & Win 8 Pro is in this laptop I am now using). I purchased a brand computer of Windows 10, an Acer Aspire T3-715 which is the one now causing me the trouble.
Help me, Paloma. What and how must I to download Windows 10 from Microsoft and to install is onto the new SSD?
My apology, Paloma. I am aware of the fact that my question is somehow manipulative. I understand well if you do not reply to this question. I will start another thread & make a new post.
Thank you.
Chuenmon