Hello Vertavienq. Welcome to the Forum.
Have you tried uninstalling the new drivers
and reinstalling the old ones?
Or, have you tried the "Roll Back" option under device properties in Device Manager?
Very often we see problems like this when the new driver
package does not properly overwrite the old drivers. It is always "best practice" to completely uninstall all the old video drivers and software before installing the new package to avoid these kinds of problems.
Install ATI Drivers: GPU-33: Graphics Driver Installation Instructions for Microsoft Windows 7
It may also be necessary to run DriverSweeper to make sure there are no conflicting driver remnants hanging around before you install the new package: Guru3D - Driver Sweeper