Hello there, sorry for posting a lot of questions. My problem was that i had black bars on the left of my screen. so i enabled GPU scaling but it made my display not supported by my monitor and i am currently working on safemode and i want to change the settings of the software back.
i have an AMD Radeon HD 7480D
Desktop system:HP hewlett-Packerd model 1850
Operating system: windows 7 ultimate 64-bit
AMD catalyst i don't remember it's version but i download it from less than a week
Motherboard+BIOS:HP Compaq pro simple form factor (SFF)