2
If you provide a little more information, you are more likely to get some help from an expert.
What were you upgrading from?
What versions of MySQL etc are you using?
What modules do you have installed?
Did any errors come up during the upgrade process?
What have you tried already to solve the problem?
Did the checksum files reveal any missing files other than those that should be missing in an upgrade such as the install ones and if so, did you replace them?
Answers to these questions will help others help you. No doubt I've missed something that someone else will chip in.
Good luck.
Optimism is the mother of disappointment.
