Q. When you right click on an INF file, the Install option is not listed?

The Install option is controlled by a inffile File TYPE entry in the Classes key at HKEY_LOCAL_MACHINESoftwareClassesinffile

Here is a Save Subtree As:

Key Name:          SOFTWAREClassesinffileshellClass Name:         Key Name:          SOFTWAREClassesinffileshellInstallClass Name:          Name:              Type:            REG_SZ  Data:            &Install Key Name:          SOFTWAREClassesinffileshellInstallcommandClass Name:          Name:              Type:            REG_EXPAND_SZ  Data:            %SystemRoot%System32rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 %1