Article writing - 2$ each (500+/- words) - Computer topics

I am looking for native English speaking people who already have been involved in article writing. There are many articles topics you can choose. You will be rewarded with $2 for the job. Please send me a private message (after bidding for min of 30$) if you are interested, preferably send me a link to your previous work (if you have any). Topics are Computer related such as computer security, antivirus, Operating System, and many similar to these. The article must contain minimum of 500 words. You can stretch it to 1000 words if you need to expand on anything. When you take up the assignment, the article must be written and returned in 4 days time. I expect good quality and 100% original work (all work will be checked with duplicate content checkers like copyscapte, etc). No payment for too poor quality of work.