Welcome to the HP Forums, I hope you're well @Adamcz11
As I understand the left click doesn't work while the keyboard is being used, I'm glad you've used the other post to your advantage but since the issue persists, I have a few steps you may attempt to resolve the issue:
PC Settings > PC and Devices > Mouse and Touchpad > Touchpad
There is an option that reads: "To help prevent the cursor from accidentally moving while you type, change the delay before clicks work."
Change this setting to "No delay (always on)".
You may also attempt a system restore to a point it had been working fine earlier.
If the information I've provided was helpful, give us some reinforcement by clicking the solution and kudos buttons, that’ll help us and others see that we’ve got the answers! Good Luck.
Riddle_Decipher I am an HP Employee
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