If you are new to Virtual Audio Cable, please read the user manual before installation. The user manual file (vac.chm, a file named "vac" with a sheet and question mark icon) is a HTML Help format file. If user manual pages are not displayed properly, please check if vac.chm file has the "Unblock" button in its Properties form. Right-click the file to open its properties. If yes, unblock it. See also "How blocking some attachments helps protect your computer" topic in Windows Help (Start - Help and Support) and http://support.microsoft.com/kb/902225. Reading the manual, don't forget that there is the "Search" tab. Having a problem, enter some words related to the problem and appropriate pages will be displayed. Of course, search feature will not help if you enter a question like "how can I use it?". It only finds pages containing given keywords.