Suddenly my project has stopped to build. I don't even know where should I look to resolve the error? What I've done I scanned my PC on viruses, added exception in Windows Defender for cmd.exe.

C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(241,5): error MSB6003: The specified task executable "cmd.exe" could not be run. System.ComponentModel.Win32Exception (0x80004005): Operation did not complete successfully because the file contains a virus or potentially unwanted software

CodePudding user response：

In event log I found a suspicious message from RAV antivirus. The problem was in RAV Antivirus. Somehow(?) it got installed on my machine and it was blocking cmd.exe from running.