Hi grumpy chook,
You can restart the computer and then try to install it again.
If it still gives the same error then start the computer in safe mode with networking and then install the program.
To start the computer in safe mode with networking click on the link below and follow the steps
Tried installing in safe mode but installer still would not initialise. Tried reinstalling my old CS5 which was working fine but I took it off to try CS6 but it came up with the same error. Adobe support advisor carn't find any errors. Thanks for any help, would be much appretiated.