My problem was the RDP session that it initiated, it errored "Remote App Disconnected" - "your computer can't connect to the remote computer because the Remote Desktop gateway server's certificate has expired or been revoked". Now since we are connecting to Capita's system I assumed this was not true. On investigation I found that this PC could not RDP to any of our internal servers the error this time was "An authentication error has occurred. The requested security package does not exist". Clearly a PC problem but what. After much digging I found the answer to be a missing registry key. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\Security Packages. Creating this as MultiString value and pasting in the values, kerberosmsv1_0
schannel
wdigest
tspkg
pku2u
livessp
msoidssp
Exactly like that, rebooting, and try again. Hey Presto. One you may be interested in.