1. let your computer especially the cpu cool down first before you start tinkering with it...
2. unplug from the electrical outlet everything connected to your computer... you may get electricuted....
3. dont force it... the clips are made of plastic so it may crack or break...
4. be sure to ground yourself from static electricity before touching any electronic equipments... static electricity can damage electronic equipments...
http://www.pctechgui...entium4_Fan.htm
again please be careful... goodluck