The specified folder is invalid. It contains spaces or illegal characters.

Description

You may see this error when installing the Quartus® II software versions 9.1 and later. Altera only supports standard alphanumeric characters and underscores (_) in installation paths for all design tools from the Altera® Complete Design Suite (ACDS).  A symbol such as the underscore (_) can be used as a place holder instead of spaces.  For example, use "My_Folder" instead of "My Folder".

Examples of unsupported characters: \/:*?"<>|!£$%^&()