Unable to install MySQL Server - Access to the Path is Denied

[Stuart Massey]

I'm trying to install MySQLServer 5.5.27, after having previously un-installed another installation on the machine (not sure what version) as it was installed by another developer who has since left the company.

All components install except the MySQL Server which fails with this message:

1:
1: Action 09:57:06: INSTALL.
1: 1: MySQL Server 5.5 2: {B9ED0ABA-7E2B-4C1B-8466-40E8BCE3DCA3}
1: Action 09:57:06: FindRelatedProducts. Searching for related applications
1: Action 09:57:06: AppSearch. Searching for installed applications
1: Action 09:57:06: LaunchConditions. Evaluating launch conditions
1: Action 09:57:06: ValidateProductID.
1: Action 09:57:06: CostInitialize. Computing space requirements
1: Action 09:57:06: FileCost. Computing space requirements
1: Action 09:57:06: CostFinalize. Computing space requirements
1: Could not access network location \Hewlett-Packard\\.
1: Could not access network location \Hewlett-Packard\\.
1: 1: MySQL Server 5.5 2: {B9ED0ABA-7E2B-4C1B-8466-40E8BCE3DCA3} 3: 3
1:
1: Final actions.
1: Install error

I can't find anything in the registry related to this product code, or anything that refers to this directory (other than valid HP software).

The directory exists, and has full permissions. Is there a config. file or something the installer reads? I'd like to change the path - or remove whatever the software is reading from to get a successful install.