open and close fonts folder with .bat

I have a piece of software that requires fonts imported- which is done through a logon script batch file. However the fonts do not work unless the fonts folder has been opened and then closed.
I have been able to open the fonts folder two ways
by calling on the rundll entry or simply by calling explorer.exe. the problem is how to shut the fonts window once opened.
So far the only solution i have is to restart the machine but i would prefer it if this was not necessary
any suggestions????