DRM

FairUse4M - cracks DRM on XP in ms media player
FairUse4M - cracks DRM on Vista in ms media player
Web article: "DRM Scorecard: Hackers Batting 1000, Industry Zero"

Useful apps

Image editing:
paint.net

Audio editing:
wavepad

Useful apps

Image editing:

paint.net

System apps

Sysinternals:

TCP View
Autoruns
Process monitor
Process explorer