The Connexion client reinstallation attempt is being caused by the Microsoft MSI self-heal technology attempting to fix what it perceives as a damaged installation. The installation is fine. To resolve the problem we need to build a new desktop shortcut. To do this:
1. Close Connexion client if it's running.
2. Hold down the Windows key (to the left or right of the Alt key) and while holding it down, press the letter r; this brings up the Windows Run box.
3. Type c: (including the colon (:)) and press Enter.
4. Double-click (if 64-bit) the Program Files (x86) or (if 32-bit), Program Files folder.
5. Double-click the OCLC folder.
6. Double-click the Connexion folder.
7. Double-click the Program folder.
8. Scroll down and right-click Connex.exe and choose SendTo > Desktop (create shortcut). If you don't see the .exe extension, look in the 'Type' column for 'Application'.
9. Double-click the new shortcut. The client should start normally.
10. Delete the original desktop shortcut and rename the new one to look like the one you just deleted.
Note: if you move the newly created icon from the user’s desktop to C:\Users\Public\Desktop, Connexion client will be available to anyone that signs into Windows.
See screenshot for complete message.