@ jonny Fraps is only for games, it cannot record your desktop.
The absolute best is
1AVCapture
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1AVCapture can capture and record anything you can hear or see on your PC. It doesn't matter if the video you want to capture comes from your webcam, the PC desktop, from your TV tuner, or from inside websites or media players. It is all good.
1AVCapture also records audio from any source including streaming audio, CDs, audio from DVDs, games, and voice. You want to record your Canmcorder? No problem. 1AVCapture supports any external device you can plug into your PC. 1AVCapture is the ultimate audio video capture solution!
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Record content directly from YouTube, Google Video, MSN, or directly from inside media players, including DRM protected content.
Capture and record your entire PC desktop or a window or a region diretly to AVI or WMV
Any audio you can hear can be recorded to WAV, WMA, and MP3, including Internet radios, CD, voice, phone and external devices such as a cassette or LP player.
Record video from TV tuner, Camcorder, VCR, or Microcameras, via S-Video, Composite-Video, USB, or FireWire.
Apply a time-stamp over video.
Enter stealth mode and remain completely invisible to other PC users.
Capture compressed JPG images from your webcam, camcorder, TV tuner, external devices, or the PC screen.
that is... if you don't care about the $59.95 price tag... but I'm sure you have "other" means of getting around that price tag

lol!