When attempting to login to Siebel Tools 8.1 client the following error message was displayed -
Further the system would not allow user(s) to enter User ID / password.
Customer verified that there were no other Siebel Tools session(s) running by checking the processes via task manager.
The Siebel root directory containing client, tools, etc. was created as read-only and with unusual file permissions. The same was true for multiple users that installed Siebel 8.1.
Possibly the incorrect permissions prevented the temporary files from being created when the user attempted to login to Siebel Tools client, resulting in the error message -
Siebel root directory (containing client, tools, etc.) was updated to have the appropriate permissions such as Administrator. This resolved the problem and users were able to login to Siebel Tools client without any problems.