If you have problems installing beta after preview

[halr9000]

I ran into this where the MSI package would not perform an upgrade, it said to uninstall first. But--I could not find an uninstall shortcut nor was it in add/remove programs. The solution is to run this:

MsiExec.exe /X{DBBC72B2-2442-4B8B-9D70-2ED6C0322916}

This will perform an uninstall so that you can install the beta.

[admin]

If you have the tech preview it should be available under Add/Remove Programs under "VI Toolkit (for Windows)".

[halr9000]

But when it's not--like in my case, msiexec will do the trick.