Well HP does load a bunch of there crap software on your box. If you have Window 8 disk a option is to a refresh which give you a clean copy of the O/S minus all your current installed software. You could then install a clean copy of HP drivers for your 8570. Then from the list that Windows supplies I would re-install all other software minus HP preloaded junk. There are settings for the CCC that you can set based on recommended settings.
You are well above the required hardware to run Witcher 2.
AMD A10-5800K, XFX 7850 Ultra OC Edition 975MHz 1gb, 16GB RAM, Win 8.1 Pro 64 bit, MSI 7778 motherboard, 500W PSU, HP P7-1235, CCC 13.9 WHQL