Problems with grub

Hello:
I would be very grateful if you could help me.
I tried to install the operating system on an old computer, however, when I rebooted it I got the following message:
error: no such device
error: unknown filesystem
Entering rescue mode
grub rescue
I have seen some options to solve this problem, but I found them too complicated for a novice like me.
I found out that there is an easier solution, using an application that can be installed on a pendrive, reboot the computer and perform the corresponding repair.
I look forward to your comments.
Thank you very much.

Since I do not have a luxury of sittingin front of your computer and I am not a psychic, please provide the following information before we can offer you a help:

  1. make/model of your computer
  2. OS you are trying to install
  3. Output of lspci
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most probably is an old 32bit system arch..

Hello:
The problem arises with my video card driver (NVIDIA Geforce GT 730) when installing Linux Mint 20.2 Cinnamon).
I found a solution that seems simple: boot-repair-disk. I have to create a bootable usb and follow the instructions, what program do you recommend to create this bootable usb?
Thank you very much.

Rufus in Windows or
UNetbootin or Mintstick in Linux

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