I downloaded and installed DB2 Express-C from the following site: http://www-01.ibm.com/software/data/db2/express-c/download.html.
However, the database is not starting. When I try to start from command prompt using db2start.exe, I get this error: SQL1390C The environment variable DB2INSTANCE is not defined or is invalid. I think the reason maybe due to the license key has expired. I thought this is a free version to use. I am using DB2 Express-C for my 10x training.
I am on Windows 7 Professional SP1.