VoiceAttack, when it is installed to its default location, is typically in C:\Program Files (x86)\VoiceAttack. If you are using the Steam version of VoiceAttack, the installation folder is usually C:\Program Files (x86)\Steam\SteamApps\common\VoiceAttack. In the installation folder you will find the VoiceAttack executable (VoiceAttack.exe), the user manual (VoiceAttackHelp.pdf), some supporting DLL files (latest version) and some helper folders. You should also find VoiceAttack shortcuts in your start menu under, 'All Programs\VoiceAttack'. If you do not see these things, the most likely thing that has happened is that you have installed a VoiceAttack speech pack that was made available to you from another vendor. These speech packs do NOT install VoiceAttack. VoiceAttack can be downloaded separately from the VoiceAttack website :
http://www.voiceattack.com. Click on the download button and you're on your way.
Also, please note that purchasing speech packs from third-party vendors does not include a VoiceAttack registration key. They make it pretty clear on their sites, but somehow that slips past some in their excitement
Hope that helps!
Gary