Notes about the WIXPROJ file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The WIXPROJ file type is primarily associated with 'Windows Installer XML (WiX)' by Microsoft Corporation. The Windows Installer XML (WiX) is a toolset that builds Windows installation packages from XML source code. The toolset supports a command line environment that developers may integrate into their build processes to build MSI and MSM setup packages. This is the first software released by Microsoft under an open-source license called Common Public License.