Perhaps you have decided to forgo system upgrades and get rid of your computer system and purchase a new one. If you've decided to donate your old computer to a charity, local group or school, it's extremely important to make sure your computer's hard drive is completely free of data. In the "no good deed ever goes unpunished" department, you need to ensure that you don't donate more than you planned.
The last thing you want is to pass on a PC when sensitive business information, or even personal information such as stored passwords, personal documents and credit card numbers that could be retrieved. When you donate a computer, you really don't know where it may end up or if it will go through the hands of a malicious person with the capability to restore previously recorded and deleted data.