Problems installing MySQL

I have a web server that is currently running MySQL 5.1 and I'm looking to install 5.5 along side of it to run a completely separate database.

I cannot uninstall or in any way interfere with the current database running.

I previously had the two versions running 'side by side' just fine, however I am looking to get Wordpress up and running and upon trying to install it I managed to foul up the root password on my previously 'fine' installation of 5.5.

I attempted to uninstall 5.5 and reinstall it, however now I'm banging my head against the wall trying to get the service to start.  I keep getting an 'Error 1067: The process terminated unexpectedly.' when trying to start the service.  The MySQL installer won't complete the installation either.  

I've tried pretty much every 'fix' I can find that's been suggested already, anyone have any ideas?   It's a Windows 2008 R2 server.
tbawarehouseAsked:
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leokuzCommented:
I have a similar issue with installing MySQL on Windows 2003 Server and may have to ask a question of my own to this regard. Previously I had it installed successfully, but after removing it from the server at some point, I now find myself being unable to install it back again (having a similar error message). Perhaps the issue is related to an incomplete uninstallation of the previous version of MySQL.

See if the following article my assist you, if not me: "How to completely remove MySQL from Windows system" http://blog.webhostingdiscussion.net/mysql/how-to-completely-remove-mysql-from-windows-system.htm

Leo

P.S. One important thing they didn't mention in this article, is that after the removal of the previous MySQL server, there can still be (even though likely disabled) MySQL service, which needs to be deleted as well, manually at least.
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tbawarehouseAuthor Commented:
That actually worked for me.  I was unaware of the 'ProgramData' location for the MySQL config files and it kept botching up the new install.   Thanks for the link.
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MySQL Server

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