What are these DLLs?

#1
Does anyone know what these DLLs are? TCC and TCMD use them on one of my systems and not on the other. The two systems are pretty much the same, both Win7/SP1.

C:\Windows\system32\api-ms-win-downlevel-user32-l1-1-0.dll
C:\Windows\system32\api-ms-win-downlevel-shlwapi-l1-1-0.dll
C:\Windows\system32\api-ms-win-downlevel-version-l1-1-0.dll
C:\Windows\system32\api-ms-win-downlevel-normaliz-l1-1-0.dll
C:\Windows\system32\api-ms-win-downlevel-advapi32-l1-1-0.dll
 
#5
I don't know if they're needed, but the current versions of those DLLs (and a handful of KB updates) were installed when I installed IE11. And something about their use must have changed (because they're being used). My work computer (no updates) has original versions of those DLLs and I haven't been able to find a process using them.