Lenovo 3000 K100 Hardware Maintenance Manual page 75

Important
Touch only the sides of the microprocessor. Do not touch the gold
contacts on the bottom.
7. Lift the microprocessor straight up and out of the socket.
Notes:
a. Note the orientation of the notches  on the microprocessor. This
is important when reinstalling the microprocessor on the new system
board.
b. Do not drop anything onto the microprocessor socket while it is
exposed. The socket pins must be kept as clean as possible.
8. Make sure that the microprocessor retainer is fully open.
9. Holding the microprocessor with your fingers, remove the protective
cover  that protects the gold contacts on the new microprocessor
 .
Chapter 7. Replacing FRUs (tower computers)