Windows 10: my ps/2 keyboard won't quit typing the letter R randomly

My PS/2 standard keyboard will not quit typing the letter r. I have plugged in a usb keyboard, I have connected a Bluetooth keyboard and it still does it. I have manually updated the driver, ran keyboard troubleshooter. I have done windows update and even some command prompt entries to try to fix it and still does it. I even got on chat with Microsoft while they remotely accessed my laptop and did some things and it worked for about a week but now is back to doing it again.

:)

 

Random Letters Typing

When typing, particularly when typing emails, the symbol \ randomly appears after I type the letter r. Additionally, after I type c or e, occasionally a period randomly follows. More frequently, the window I type in maximizes to the fill screen setting or demaximizes as I type. This also seems to occur randomly. The touchpad is turned off. Also, H is almost always capitalized when it is the second letter of the first word of a sentence - I thought this was my poor typing, but it is consistently H that does it. A few other letters also do that, so perhaps that one is on me, but I don't generally have that problem on other keyboards.

Steps I have tried to fix it:

1. Uninstall and reinstall keyboard drivers.

2. Keyboard troubleshooting wizard.

3. Checked sticky keys and language settings.

4. Downloaded Synaptics driver database for the touchpad.

5. Used an external keyboard - and these problems do not occur on the external keyboard.

This has occurred since I originally set up the computer.

Note: While typing this question, the window maximized to 'fill' in the middle for no apparent reason.

 

Internal Keyboard showing as Standard PS/2 Keyboard in Device Manager

Sr, I am using Windows 10 on my Lenovo Laptop. My PC was OK till I connected a PS/2 keyboard on it. After I disconnected that PS/2 keyboard, My internal Keyboard is badly working i.e it is autotyping a particular key randomly and whenever I go on Device
Manager, The keyboard Driver is showing as Standard PS/2 keyboard though there is not any PS/2 keyboard connected. I have uninstalled the keyboard driver and restarted my PC but there is a beeping sound and the Standard PS/2 keyboard driver is back on device
manager. I have also removed my internal Keyboard and reinstalled it but no difference was made. I have also attached the Standard PS/2 keyboard again but nothing worked. I also uninstalled and reinstalled Windows 10 but nothing actually worked. Should I buy
a new internal Keyboard? Will that fix the problem? I actually don't know why is my internal Keyboard is showing as Standard PS/2 keyboard in device manager. Please help and suggest me what to do to fix this.

 

PS/2 keyboard not working

I thank you for your quick response. I have tried all methods suggested by you but none was helpful. Anyway thank you very much.