On my system (Win 8.1 pro 64bit, Intel HD graphics, 1920x1080) CCleaner v5.00.5035 looks all jagged and not the sharp clean look from the screenshots.
Already tried disabling the high DPI scaling in compatibility settings.
Here's how it looks and what my settings are:
http://puu.sh/cT0qx/2fcf8928ec.png
http://puu.sh/cT0ES/28a7720dab.png
http://puu.sh/cT0FQ/ef6bbc2cad.png