Greetings

What version of windows are you running?

Also have you closed all programs before attempting to install.

If you are attempting to install from the internet, might I suggest you d/l the installer to your desktop, and install after you have closed all other applications that are running.

I installed LW pro 4.8.0 last night without incident.

I did have one minor incident, when attempting to run the 1st and 2nd time, But I believe that was related to my system, as LimeWire did start and connect okay.

You can read my post in the LimeWire Beta Forum under LW 4.8.0, for how I resloved that problem.

Just a thought.