Attempting to apply updates Refactor!Pro-1.0.31.exe and CodeRushNET-1.1.44.exe both result in an alert box containing the above error message.
Steps to Reproduce:
On Windows XP with Visual Studio 2003 and 2005 installed (existing version of DXCore products work correctly)
Run setup wizard
Accept notice that "other products rely on DXCore"
Approx 10secs later the error is displayed.
Wizard rolls back installation and quits.
Refactor!Pro and CoderushNET upgrades are applied successfully