The program can't start because msvcp80.dll is missing

Question

I work on a machine with win 7 32bit on visual studio 2010.

I tried to run in release mode a code that work fine on other computer(win7 64bit), and the following message

Answer 1

This just means that you link agains MSVC C runtime dynamically. So you have to install the so called redist package.

msvcp80.dll -> VC 8 -> VS 2005

X86 – http://www.microsoft.com/downloads/details.aspx?FamilyId=32BC1BEE-A3F9-4C13-9C99-220B62A191EE&displaylang=en

X64 - http://www.microsoft.com/downloads/details.aspx?FamilyId=90548130-4468-4BBC-9673-D6ACABD5D13B&displaylang=en

The dlls where installed to a central place by the redisrt package and should be resolvable after installation.

Answer 2

Can you check to see if your dlls are 32bit ? Maybe you have the 64 bit versions.

See How can I test a Windows DLL file to determine if it is 32 bit or 64 bit?.

Answer 3

Install Dependency Walker and run in 'Profile' mode (f7) which will show you the dlls it's looking for and failing to find.

Answer 4

See this question.

You mentioned that you've installed the VC8 redistribute packages, but you may have missed the "correct" one.

You probably want: Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package MFC Security Update