Unable to install Double Twist on Windows Vista OS

I had a Double twist downloaded from Airsync and it was installed successfully. It would work like charm until one day there was this pop up message asking me to update the version of Double Twist.
There was this latest version of Double Twist released, which I tried to update on my machine Windows Vista. It was coming up with an error message to uninstall a previous version so I completely uninstalled the previous version of Double twist in order for me to reinstall the latest version.
I now try to reinstall the latest version and get an error message:
Error opening file for writing: C:Users***AppDataLocalTempExecutor.exe
Click Abort to stop the installation, Retry to try again, or Ignore to skip this file.

Earlier I did have a working version installed on my machine.
Has anyone come across this error message?
