I got the same not clear font on my device manager I just set my display settings to medium (125%) not the default larger (150%) all my fonts now are smooth and clear but all scaled to small font even my desktop icons which I like...
yup, it was the same with me, 150% made dialog boxes and device manager ugly, while 125% displays text everywhere well. I tried various clear type settings but none were fixing it
It happens because the Control Panels and MMC Consoles are all still using XP era GDI Rendering, it gets better in the Windows 10 until then using scaling will cause the fuzzy fonts....