The LiveSwitch installer has a known issue affecting versions earlier than 126.96.36.1992 where uninstall will fail because of a dependancy on the existence of a libs/win_x86 folder in the Media Server folder. The workaround is to create a libs/win_x86 in the Media Server folder and try again.
This also affects upgrades from versions earlier than 1.1.462 to later versions because the older installer runs first (to uninstall itself) and encounters the same problem. The workaround is also the same.
When this error occurs you will see the following in the event viewer:
Product: LiveSwitch -- Error 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor. Action: RemoveFeature2DownloadedFileX86, location: C:\Program Files (x86)\Frozen Mountain Software\LiveSwitch\Media Server\lib\win_x86\, command: cmd /c del /f openh264.dll