Certificate install with V4

hi,
can please somebody help me to get the right way to install a cert into Machine Root.
tried this but looks like its not working the right way:
certutil -enterprise -f -v -AddStore "Root" '$DirSupportFiles\certname.crt' import-certificate -path '$DirSupportFiles\certname.crt' -CertStoreLocation Cert:\LocalMachine\Root

thanks for the help

Greg

You need to learn the difference between ' and "
Try this:

certutil -enterprise -f -v -AddStore "Root" "$DirSupportFiles\certname.crt" import-certificate -path "$DirSupportFiles\certname.crt" -CertStoreLocation Cert:\LocalMachine\Root