Thank you for posting back the needed information Bernas.
Please remove DriverAgent program by your Add or Remove Utility in Control Panel. This program is not recommended as it is considered a crapware. Did you use this software for updating/installing your system drivers? The correct video driver for your AMD Radeon HD card is found from this site. Please use the Custom install and select either the driver only, selected or the whole CCC package.
Remove and update the following softwares :
All Iobit Products
Advance System Care 7
Adobe Flash Player 10 ActiveX -> Remove and or update.
Firefox -> Update
HP Products/Solution Center (?) -> or confirm if its needed on your system
See also the correct drivers for your motherboard's chipset, built-in video, LAN card, etc. from the manufacturing support site. Let us know of the results next time.