Hi Eugen, .vcproj files are xml files with all the settings of projects, dependencies etc. specified. Open your .vcproj file in notepad, find 'Debug-x86.props'. You will find a path to these pointed to XSISDK folders\make files folders. Make sure the path is all legal with correct path separator and without any illegal characters. You can edit your .vcproj file and save. Try to open it again, if you see more of these errors try to fix them all.
To fix the path you can set the separator to '\\'. I am not sure if this will solve the problem, but from the error you are getting it is worth a try.
