Parallels Tools is failing to install as well for me...but for different reasons :-/
I just upgraded to Parallels Desktop 6 from 5 today. I'm running Windows 7 on a Mac with it. I uninstalled Tools and McAfee like the instructions told me. I upgraded, and found that my shared folders weren't working. I tried to reinstall Tools, but the installer gets about halfway and throws the following error: "Error 2738.Could not access VBScript run time for custom action." and then "An error occurred while trying to install Parallels Tools. Press Ok to have your computer to restart and you can try to install Parallels Tools again."
The funny part about this is that it says Tools is installed, except Tools doesn't show up under Add/Remove Programs. The folders are there, but they appear to be log files; nothing vital.
tl;dr I can't access /psf and Tools says it's installed, but lies to me.
Last edited: Oct 11, 2010