FWIW, I have the same problem (Windows 10 Pro 64 bit, grayed out Security box - reading "Unable to reach server). The remainder of Health Check, including the Speed database, works as expected.
I went to Tools > Software Updater to see what programs were listed for your evaluation, but none were shown - so I clicked "Refresh".
CCleaner Pro responded "It seems like you're offline. Please check your Internet connection and try again." Trying a second time gave the same results.
Let us know...
Thanks!
