The files in this directory are called "runtime modules". These are files which contain common code which are required by some programs. By having the common code in a runtime module, individual programs can be made smaller. You do not have to bother with these files unless a program says that it requires one of them. The program's documentation will normally tell you which runtime module is needed and where on your hard disk to put it. If a file has a .ZIP extension, such as VBRUN200.ZIP, you can install it by changing into the DLLs directory and typing \PKUNZIP VBRUN200.ZIP C:\WINDOWS assuming C:\WINDOWS is your Windows directory on your hard disk. If a file does not have a .ZIP extension, such as VBRUN300.DLL, just type: COPY VBRUN300.DLL C:\WINDOWS