I would suggest that when you post a request, you state what you are seeking, because your title heading of "help" doesn't convey the message.
You should erase the contents from the hard-drive, because the memory would hold no personal information. This can be done in a number of ways, either replacing the hard-drive totally and destroying it, or using one of a number of download programs that will 'blank' the information on the hard-drive. It will not completely remove all the information on the hard-drive.
CCleaner as a program within itself that may help. Or alternatively check out the majorgeeks website for an alternative download. http//www.majorgeeks.com