So I have now tried several more installs and repairs but to no avail. I searched for the target for the Zimbra shortcut on my desktop which turns out to be Zdrun.vbs. When I click that I get a Windows Script Host
Script : C:\ Program Files\Zimbra\Zimbra Desktop\win32\Zdrun.vbs
Line : 64
Character : 3
Error : Path not found
Code : 800A004C
source : Microsoft
VB Script Run Time Error
Would dearly love to get ZD back as I have tried almost all the other web based mail packages at this stage and none of them come close to Zimbra in terms of features and performance.