I wonder what problem WOT has with that branch of Eaton’s site. I mean, from what I know of it, it is basic documentation about their products - user manuals and such. (I have seen report of ransomeware sometimes masquerading as PDF. downloads, but this is not the case here - not yet anyway.)
Like this, for example http://powerquality.eaton.com/Products-services/Backup-Power-UPS/5110-eol.aspx#documentationtab
Or, because I want to find what on earth “X-slot” (as it appears on the Device Manager entry for this thing) means, http://powerquality.eaton.com/Products-services/legacy/usb-card-info.asp

I always had the idea that Lansafe was required for the UPS to do a ‘graceful’ shutdown. Tho, in the lifetime of the first battery (about 15 years), I never found out for sure…
In any case, where the problem lay this time was the (required) driver installation which I wouldn’t have known about except for Lansafe not functioning properly. The driver installation was a breeze in XP; Not so in 8.1.