After click [Next] to instll visualcron 5.75 on wndows 2008R2 sp1 (with latest patch and dotnet4), the following error occur:

[Unable toexecute the required file: The following system error hs occurred: the directory name is invalid (267)]

But I do not have error if I try to install old version 5.69

We tested this now on Windows 2008 R2 Standard edition (not SP1) though without a problem.

Are you using Standard edition?

Could you explain where in the installation steps you get this error an add a screenshot?

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Yes, It is windows 2008 R2 standard with SP1 and latest ms patch.
Once I click [Next] on first install steps, it show the error messages.

Is it possible to add a screenshot?

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Sorry. It works now.
After I re-download the file, the installer run smooth.

Great, thanks for the feedback.

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