Hello I want to set up cpu mining on a HP Pavilion Slimline s3620f PC desktop. Is that possible? How can I do it, and what program can I use?

also I know GPU mining is better and I have another desktop that does gpu mining throughout the day, but I cannot leave that computer on during the night.

I plan to use this old hp desktop to mine during the night if possible. Maybe mine 24/7 if possible.

Here are the specs of the desktop:

OS: Windows 7 pro 64-bit
CPU: Intel Pentium E5200 @ 2.50GHz
RAM: 4 GB
Graphics: NVIDIA GeForce 7100 / NVIDIA nForce 630i (Microsoft Corporation - WDDM)