Problem
Since Windows Vista (that includes Windows 7), the place where programs store some of their information has changed. This makes finding the DB2 log files (equivalent of db2diag.log) more difficult.
Solution
The log files have moved under the directory tree node C:/Program Data/IBM/DB2/DB2COPY1/DB2. Under that directory there is a log and an events directory. This being Windows, the events directory has the logs that on Linux/Unix are the equivalent of the db2diag.log.
