After installing Lightroom 3, we get a message saying "An error occured when attempting to change modules"
The Lightroom background comes up but I don't have the side information and no arrow to get it.
Can anybody help.
Best guess is a permissions problem although you haven't mentioned what operating system you are using.
Have a look at: Error changing modules | Lightroom
Thanks this did end up helping me out, eventually.
Retrieving data ...