I read this somewhere once when I was looking for a solution to a different issue with the blank screen... maybe it will help...
The following was posted on:
http://www.cryptech.com.au/troubleshooting/black-screen-after-installing-logmein-and-restarting/Fixing The Problem
Start the system in “Safe Mode” by tapping “F8¿ key while the computer is starting, before the “Loading Windows” screen is shown. Select “Safe Mode” and press enter.
Once in safe mode, follow these steps:
Windows XP
1. Click “Start > (Settings) > Control Panel”
2. Double-click “System”
3. Click “Hardware > Device Manager”
4. Find “Display Adapters >LogMeIn Mirror” then Right-Click and click “Uninstall”
Windows Vista
1. Click “Start > Control Panel”
2. Double-click “Device Manager”
3. Find “Display Adapters >LogMeIn Mirror” then Right-Click and click “Uninstall”
You may then need to reinstall your display drivers. Download the latest drivers from your display adapter’s manufacturer website.