Many DLL files are provided with the Windows operating system, while others are included with Windows programs. They allow various program functions, such as communication with external devices and reading and writing files. In some cases, DLLs are referenced by cross-platform applications running on macOS.Deleting or modifying the contents of a DLL file may cause errors within the program that references the file. For this reason, DLL files generally should not be opened or edited. However, if an application tries to access a DLL file that has been corrupted or is missing, that program will no longer work. If this happens, you may need to reinstall the program or download and install a new version of the DLL. Mfc42u.dll - A Microsoft Foundation Class (MFC) library required by some Windows programs to run.
This DLL is included with Windows XP, Windows Vista, and Windows 7 and is most often located in the C:WindowsSystem32 directory. If you try to open a program and Windows reports that you're missing mfc42u.dll, likely your Windows installation has been damaged. You can use a system restore point or your factory system repair disc to fix the issue.
Other related files include mfc42u.dll, mfc40.dll, and mfc40u.dll.mfc80u.dll - An MFC library required by some Windows programs created with Visual C 2005. If you're missing this file, you can install the to install it. Programs that use this DLL generally install it because it is not included with Windows by default.
Install Dll Windows 10
Other DLLs installed with the package include msvcr80.dll, msvcm80.dll, msvcp80.dll, mfc80.dll, mfcmifc80.dll, and mfcm80.dll.mfc90u.dll - An MFC library required by some Windows programs created with Visual C 2008. If you're missing this file, you can install the to install it. Programs that use this DLL generally install it because it is not included with Windows by default. Other DLLs installed with the package include msvcr90.dll, msvcm90.dll, msvcp90.dll, mfc90.dll, mfcmifc90.dll, and mfcm90.dll.mfc100u.dll - An MFC library required by some Windows programs created with Visual C 2010. If you're missing this file, you can install the to install it.
Programs that use this DLL generally install it because it is not included with Windows by default. Other DLLs installed with the package include msvcr100.dll, msvcm100.dll, msvcp100.dll, mfc100.dll, mfcmifc100.dll, and mfcm100.dll.
The error probably appeared because the program installation was corrupted or after performing a malware cleaning procedure on the same computer, without prior uninstalling it from Windows. For that reason, we installed the unwanted program again in order to try to uninstall it again from Windows Control Panel (Add/Remove Programs). But the ' Windows Installer package.DLL could not be run' error message appeared again during the uninstallation progress. After some tests, we finally found the following solution to bypass the ' Windows Installer package.DLL could not be run ' problem.