the only things I can find on my computer after installing the game are shortcuts
Press the WIndows-Key and E together to start the Explorer. If you used the standard folder you will find the installed game files under C:\Program Files\Core Design\Tomb Raider - The Last Revelation. Right click the tomb4.exe (the displaying of extensions might be turnd off on your computer, so it might be only tomb4). Click Properties and the Compatibility-Tab. Set it up to use Win98/ME compatibility mode and click OK. Start the game by doubleclicking the tomb4.exe or your shortcut in the start menu.