I've had problems getting TiVo Desktop installed. I tried running as admin, reinstalling VBScript, killing tasks and removing old desktop files. Nothing worked. Finally, i found a posting on another board where people were having trouble installing itunes because of a VBScript error.
The following solution helped me install Desktop 2.6!
Hi, found the problem. Vista for some reason dosnt register VBScript. What you have to do is first of all find where vbscript.dll is, mine was in C:\Windows\System32, but I think it changes dependant on your version. Next you need to go to start -> accessories and the right click on command prompt and click "run as administrator", next type "cd C:\Windows\System32" (replace the dir if its differnt for you) and then type "regsvr32 vbscript.dll". It should then confirm that vbscript has been registered and everything should work.