If NOT "%1%"=="foo" (echo %bar% Text. >> "%USERPROFILE%DesktopLog File.txt")

) was unexpected at this time.

C:>      If NOT "ARGUMENTBARUSERPROFILEDesktopLog File.txt")

If NOT... (
  echo...
)

@echo on
setlocal enableDelayedExpansion
SET bar=test
If NOT "%1%"=="foo" (echo %bar% Text. >> "%USERPROFILE%DesktopLog File.txt")

If NOT "%1"=="foo" (echo %bar% Text. >> "%USERPROFILE%DesktopLog File.txt")

If NOT "%1%"=="foo" (echo %bar% Text. >> "%USERPROFILE%DesktopLog File.txt")
        /---------------/   -----------/           ---------------------- ...?