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I can't uninstall the the trial version of MySQLDirect .NET version 2.80
If I try i get the following message -

Product: Core Lab MySQLDirect .NET Data Provider Trial -- Error 1722.There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor. Action UninstallAddin, location: C:\WINDOWS\Installer\MSI50.tmp, command: "VS70, VS71" MySQLDirect "Core Lab DbTools"

- On my computer i don't have visual studio installed, maybe thats the reason for the problem. Anyway how can i uninstall the Data Provider ?

To remove MySQLDirect .NET manually you should:
Stop Windows Installer service;
Delete key in the registry HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products that corresponds to MySQLDirect .NET;
Delete key in the registry HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Assemblies that corresponds to CoreLab.MySql.dll;
Remove all CoreLab.* assemblies from GAC;
Stop IIS service if you install Web demos virtual directories;
Remove \Program Files\CoreLab\MySQLDirect.NET folder.