MSVCP100.dll and MSVCR100.dll missing libraries in Windows 10.

It has been a few days since the release of Microsoft's new operating system, Windows 10. The installation and upgrade process went smoothly. The system feels noticeably faster and more intuitive. However, it is not 100% bug-free. One issue I encountered is the missing msvcp100.dll and msvcr100.dll libraries. The error message regarding their absence appears after system startup when launching various programs, such as the Dropbox client, Bitdefender antivirus, Origin, and others. These libraries are part of various Visual C++ Redistributable packages. Many websites suggest installing Visual C++ 2010 x86 10.0.40219.455 or Visual C++ 2010 x64 10.0.40219.455, depending on whether you are running a 32-bit or 64-bit system. However, this might not be enough, as a given program might require versions from 2005, 2008, or 2012 to run. You can handle this manually, but there is also a multi-installer available. 

Before proceeding with the installation, it is worth using the System File Checker tool, which might resolve the issue without the need to install additional libraries. 

Step 1 - launch the CMD console with administrator privileges. 

Step 2 - run the following command:

sfc /scannow

More information about the file checker tool can be found at: 

https://support.microsoft.com/pl-pl/kb/929833

If the above does not resolve the issue, you will need to reinstall the Visual C++ packages. 

Using the multi-installer will install the following components: 

The multi-installer can be downloaded below: 

Visual C++ Multi-Installer for Windows. 

During installation, the Windows Explorer process may be stopped. After the installation is complete, you should restart your system. The error messages regarding missing msvcp100.dll and mcvcr100.dll libraries should disappear.