- “Cannot start Microsoft Office Outlook. Mapi32.DLL is corrupt or the wrong version. This could have been caused by installing other messaging software. Please reinstall Outlook.”
On the system where it is Outlook 2003 running, installing and uninstalling of Microsoft Outlook 2007 beta 2 can cause this problem. This is because the file that is installed from the following folder on your computer C:\Program Files\Common Files\System\Msmapi\LocaleID won’t be uninstalled even when you uninstall Outlook 2007.
What is Mapi32.dll
The Mapi32.dll file is connected MAPI. It's a procedure that is considered as a module for that Windows Messaging API (MAPI).
How to Fix Mapi32.dll Error
When you receive the error message which indicates that you can reinstall the application to fix error, you can try to reinstall the application. As mapi32.dll file is used by a couple of programs, if the error message pops up at windows startup, it is difficult to identify which program cause the error, so the way to re-install the problematic program is not practical in such circumstance. Reinstalling the error program to fix mapi32.dll not found error is only adoptable when you know which program generate the error.
You should also scan for viruses on your system with an antivirus program. Viruses are basically like small applications which latch into.dll files like mapi32.dll and then try and corrupt / damage them. This is a major problem and in order to fix it, you should use an antivirus program to scan through your PC and repair any infected dll files.