Try to replace or repair the msvcrt.dll file. Search your machine in C:WINDOWS\System32\Dllcache might have a good copy of msvcrt.dll to copy and paste into your C:\Windows\System32 folder over the bad one there.
You will need to save the new file into the place the old file lives and register the .dll if it does not work immediately after pasting it. Here is how to register a .dll: http://www.tech-faq.com/register-dll.shtml
I don't know what version of Windows or other programs you are running, one of these may help.
http://www.ascentive.com/support/new/support_dll.phtml?dllname=msvcrt.dll
http://support.microsoft.com/kb/192123
http://www.instant-registry-fixes.org/how-to-fix-msvcrtdll-errors/
In the future when posting technical questions, please list your Windows operating system, the program that is having the problem, as well as the full error message if possible in order for us to troubleshoot faster. More details are helpful. Good luck.