Greetings,
I invite you to read the announcement regarding Pre-installed software by following this link: https://forums.malwarebytes.com/topic/249679-adwcleaner-74/
You should also be able to retrieve "lost" files from the Quarantine.
If you want to manually reinstall HP Support Assistant, you don't need to call HP for their assistance, you can follow this link: https://www8.hp.com/us/en/ca...