Try Display Tuner a small application that adjusts the brightness, contrast and color of your screen.
http://display-tuner.en.softonic.com/
A small softonic downloader-installer will downoad, execute it to start the application download, and accept the End User License Agreement,
Mark No thanks on "Download and install Reg Clean Pro (recommended)" and press Next
Mark Custom (installation) and unmark every case under it... If you don't, an unwanter application will auto-install.
Press Next and the download will start... when the download is complete, the Auto-Installation will start...Cancel it and exit the Softonic Downloader-Installer and scan the Display Tuner installer with your antivirus, and next install the application yourself.
The Display Tuner downloads to your desktop in case you wonder where to look for it. After installing the application delete the installer and softonic downloader