If you would like to learn about embedded programming and hardware development, start small. 1. Purchase a student kit from Microchip. http://www.microchip.com/stellent/idcplg?IdcService=SS\_GET\_PAGE&nodeId=1406&dDocName=en539716&redirects=picdemlab 2. Read ALL of the information provided. 3. Familiarize yourself with the datasheet for the micro-controller you are using. It is your best friend. 4. Follow the examples closely. 5. Visit the forums to search for answers to your questions. 6. If after step 5 you are still unable to find the answers to your questions, ask for help online. People prefer to only help those that are willing to try to help themselves first.

You started with a 90 day policy and reduced it to 60 days based on the policies of other companies? Why? To make more money?

This is not a time to fire the customer since this appears to be a one time incident with this customer. Either the customer did not read the required system specifications or the customer thought the specifications did not apply to them for some reason. Simply explain that the software will not function on ME due to incompatibilities and this is the reason that you specify in your system requirements that the user use either XP or a newer operating system. Offer them possible solutions such as upgrading to a newer operating system (even be prepared to tell them where they might can find the software) or offer a refund with a restocking fee. Afterwards, apologize for the inconvenience and ask if there is anything else you can help them with today.