Depending on your system you need to have one of the following installed:

Microsoft Visual C++ 2008 Redistributable Package (x86) - 32bit
http://www.microsoft.com/downloads/details.aspx?FamilyID=9B2DA534-3E03-4391-8A4D-074B9F2BC1BF&displaylang=en (Englisch)
http://www.microsoft.com/downloads/details.aspx?FamilyID=9B2DA534-3E03-4391-8A4D-074B9F2BC1BF&displaylang=en (Deutsch)

Microsoft Visual C++ 2008 Redistributable Package (x64) - 64bit
http://www.microsoft.com/Downloads/details.aspx?familyid=BD2A6171-E2D6-4230-B809-9A8D7548C1B6&displaylang=en (Englisch)
http://www.microsoft.com/Downloads/details.aspx?familyid=BD2A6171-E2D6-4230-B809-9A8D7548C1B6&displaylang=de (Deutsch)