You have my sympathies having just been through the most catastrophic systems crash I think I have ever seen ... and it appeared to be traceable to a sycrosoft license/dongle issue.
Anyway ... I agree that uninstalling and reinstalling eLicensor is a good start.
If you have another computer, install eLicensor on that and check that your licence on the dongle has not been corrupted.
Bizarrely, on our Windoze 7 professional system, the dongle only seemed to be happy when inserted into a USB 2 slot (that is, issues arose when inserted in a USB 3 slot).
12th & Vine Post
Intel i7 860 at 2.8GHz, 4 GB platinum memory RAM, ASUS P7855D E-Evo, Windows 7 Professional, 3X SATA internal (Seagate/Raptor) and 2X firewire HD, 2X external DVD drives: Plextor/Pioneer, RME HDSPe AIO, Mytek converters
WaveLab 8 current release, iLok, Waves, DMG (Dave Gamble), Sony Oxford, Weiss, Class A, Valve and Custom Stuff