Do not download msvcp120.dll from repairtofix.com or any DLL download site. Those files can contain malware.
If the DLL is corrupted but still present, Windows can repair it using built-in tools. repairtofix.com msvcp120.dll
These commands will replace any corrupted system DLLs, including MSVCP120.dll, using cached versions from Windows Update. Do not download msvcp120
If the error only happens with one specific game or application (for example, "GTA5.exe - System Error"), the issue might be with that specific program's installation. These commands will replace any corrupted system DLLs,
This is the official and safest fix.