My pc is HP Pavilion 24-qa176in All-in-One Desktop PC, my question is

Hi @usamasufi

It appears it is possible to replace your HDD with an SSD. First, turn it on and back up all your data. Then, turn it off, unplug it, and follow this guide to remove your back cover. Once that is removed, just unplug the hard drive (in the red box in the below picture) and plug in your new SSD.

You may have to remove some screws in order to get the old drive out. If you need a new SSD to put in, iFixit has a nice 500GB one. Also, while you're at it, you could create a guide so others tackling this same repair will have an easier time fixing their computers.

Good luck!