Critical Issue
You may see this error when you change devices using the device icon in your DSP Builder design. The Quartus II software v14.1 needs Microsoft Visual C 2013; DSP Builder v14.1 needs Microsoft Visual C 2012.
This problem affects DSP Builder v14.1 on Windows and users who install Altera Complete Design suite without administrator rights on PCs that don't already have Microsoft Visual C 2013.
To work around this problem, install Microsoft Visual C 2013 from http://www.microsoft.com/en-gb/download/details.aspx?id=40784
This problem is scheduled to be fixed in a future version of DSP Builder