OFF: "Setup cannot register Mfc40.dll" Error MessageID: Q178652
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When you run the Microsoft Office Setup program, you may receive the following error message
followed by:Unable to register Mfc40.dll
Setup cannot register Mfc40.dll in the system registry because an older version is in use. Close all applications and try again.
Another program is running that is using any version of the file Mfc40.dll.
Close all programs by removing the icons from the Startup folder and closing any programs that are on the taskbar. To do so, follow these steps:
Some programs install different versions of the Mfc40.dll and the
Msvcrt40.dll files than the Microsoft Office Setup program installs. If
one of the files is the wrong version, the Microsoft Office Setup program
may fail to complete successfully.
Both Microsoft Office 7.0 and Microsoft Office 97 install the following
versions of the Mfc40.dll and Msvcrt40.dll files:
Mfc40.dll Size: 924,432 bytes Version: 4.1.6139
Msvcrt40.dll Size: 326,656 bytes Version: 4.10.6038
For more information about incorrect versions of Mfc40.dll and Msvcrt40.dll, see the following article in the Microsoft Knowledge Base:
Q163556 "Unable to Register Mfc40.dll" Error During MS Office Install
Q153733 PRB: Wrong Mfc40.dll and Msvcrt40.dll from ActiveX CD-ROM Disc
Q159685 ACC95: "Unable to Register Mfc40.dll" Error Installing MS Access
Additional query words: errors errs err
Keywords : kberrmsg offwinsetup
Version : WINDOWS:7.0,7.0a,7.0b,97
Platform : WINDOWS
Issue type : kbprb
Last Reviewed: May 4, 1999