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Can't install Aspose.Cells on Vista

The error code is 2869. My login has administrative rights. When prompted to allow the install I click Continue.

It says there may be a problem with the install package.

Why is this happening?

Is IIS installed on your vista? If yes, this is caused by Vista's User Access Control.

Please check http://www.petri.co.il/disable_uac_in_windows_vista.htm .