The sync agent can be manually removed by deleting the reg keys specified earlier along with the keys specified as the Service
The areas that need to be searched and have the SyncAgent keys removed:
2) HKEY_Users(user ID - best to just search for "SyncAgent" to locate the correct user)\Software\Microsoft\CurrentVersion\Uninstall\
There should be a couple of items found, a key (under a folder with no distinguishable name),and a Folder (named "AuthAnvil password SyncAgent") Both the Key and the folder need to be removed
Don't remove any keys under "install", or "Service". these steps are strictly for the "Uninstall" areas.