Spyware for my computer

Spyware is the computer software program or a device which gives access to a person and allow them to access your data and files without your permission.
Spyware can keep track of keystrokes, software installed and the website you have visited. Once the spyware is installed, it can run in stealth mode, and it is difficult to uninstall or delete.
To know more about spyware, you can search over the internet.
Similarly, an employee monitoring tool can also be used for keeping an eye on the activities done on any computer system. Basically, it is used by different companies for keeping an eye on their employee's activities.

If you need spy computer software,please try Anykeylogger

Use some pc monitoring apps like sniperspy:http://www.monitoring-softwares.com:
http://www.adiguo.com/keylogger-software-reviews.html it will record sreen and other internet usage.

If you want to capture screenshots of the computer, you can try this PC Keylogger.

I use http://www.easyspy.co.uk for the simple reason it tells you everything that happens on your pc.And the quickstart guide that you get when you become a member is great for beginners such as me :)

Best way is not let them to use your computer.
and you can use keylogger software which you can find many out there but i don't recommend for this activities so
if you have to let others use your computer then just let them log on as guest or through limited user so they can not make changes in your computer.

Good luck and rate all answers.