After reading this (http://kenny-tm.xanga.com/651048063/parallel-programming-using-openmp-with-visual-c-2008-express/) it seems that vcomp90.dll is available from Microsoft Visual C++ 2008 Redistributable Package (http://www.microsoft.com/downloads/details.aspx?familyid=9B2DA534-3E03-4391-8A4D-074B9F2BC1BF&displaylang=en)