Tue Aug 21 16:00:08 2007
Shutting down instance (abort)
License high water mark = 1
Instance terminated by USER, pid = 10092
What's after the termination in the alert log?

Instance is aborted by user 10092. But still you can see some oracle processes running. Check
> ps -ef | grep ora
> top -- to see if any oracle process is still running.

Now you can delete the file /u01/app/oracle/product/10.2.0/db_1/dbs/lkinstMSBD1
If no oracle process is running try to start the db by force -if still unsuccessfull then go for reboot server should be the final option as this would clear all the locks.