Hi First of all, i want say i am a fool and i did something foolish -I removed my PMDG 747X v2.1 folder by accident, and I can no longer reinstall the aircraft (the installer keep tellingme the software is installed and then closes down). when i try to use the add or delete program option under win vista 64, a error message just pop up saying the installer have stoped working.Please tell me a fix on how to do a clean removal of pmdg 747(i mean all trace of it)since i don't want to reinstall windows (since my fsx have about 70gb of addon already installed!!!!)Thanks every one

Check the recycling bin?Try to find the uninstaller from the START menu?If that doesn't work you can always try the support forum here:http://forums1.avsim.net/index.php?act=SF&s=&f=352

Look for an entry for PMDG in your registry HKLM\software\pmdg .. I don't have it so I'm just guessing.Go to MS Technet and get procmon.exe and see what the installer is looking for during the install and remove it.Or ..... ask PMDG for support.... I'm sure they have seen this before.