Why are my Shift, Ctrl, Windows and Alt keys all being pressed without me pressing them?

[Windows 10]

When I boot my pc up everything runs fine but after a while my keyboard no longer functions normally. I pulled up the on screen keyboard and it shows my Shift, Control, Windows and Alt keys all being pressed. This has been happening for a month now and I am unable to do anything on my pc due to this. I have deleted drivers, reset the pc completely, booted it in safe mode and used different keyboard and cables yet the problem still occurs. Please help

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