AIS display issue in opencpn

[doublebubble]

I have had my Vesper 850 displaying ais targets in opencpn for a few years now, two weeks ago still working fine, as of yesterday it doesn't work, this is with V5.2.6, all of a sudden the Vesper cannot find a com port to use and apart from that most of my com ports don't show up anymore, strange thing is if I plug in a different devise to the same usb port that the vesper was plugged into that component works but now the vesper doesn't, tried updating drivers etc. Our dedicated GPS still works fine, does anyone have any idea as my brain is now exhausted, worked fine next day nothing.