USB device not recognized when connecting Arduino Uno(original)

Development Tools IDE 1.x
1

I have a Genuine Arduino Uno R3 that I Connect via USB to a Windows 10 laptop running Aruino IDE 1.8.13. When i connect the usb cable the green ON LED lights up and the amber L led lights up and stays constantly on.

test1: i have another 4 arduino uno's i tested them and was able to connect to the laptop using the same usb port and dowload a program to each arduiono other then the one that gave the USB device not recognized. Since im using the same USB port on the laptop, same cable and same IDE for all 5 and only one fails i dont think it is the driver or the cable but something on the arduino itself.

test2: I attempted connection using my desktop Windows 10. I installed a fresh version of the arduino IDE and used the same cable as on the laptop. I got the same error or USB device not recognized but this time it showed com10 under the Tools>Port menu. I selected it and tried to download the Blink sample program. which failed but this time it gave me an error avrdude: stk500_recv(): programmer is not responding. So if i undertand this correctly it means i need to burn a bootloader.

Followed instructions for Arduino to Arduino burn bootloader but got Error while burning bootloader.

avrdude: ser_send(): write error: sorry no info avail

avrdude: stk500_recv(): programmer is not responding

avrdude: ser_send(): write error: sorry no info avail

avrdude: ser_recv(): read error: The I/O operation has been aborted because of either a thread exit or an application request.

2

Did this problematic Uno work before? If not, what was it used for the last time that an upload worked.

As it shows a COM port, your TTL-to-USB converter is probably OK. If you can't burn the bootloader (assuming connections are OK), it indicates in my opinion that the 328P chip is damaged. If it's a DIP version, you can buy 328P chips with the bootloader pre-programmed.