How do I get my acer aspire 4250 to factory reset it’s not accepting the recovery discs and says device changes and redundan

[eisus123]

acer aspire trouble loading recovery discs says change in devices and redundancy

 

[Alabalcho]

Put these "recovery disks" in known-to-work computer, and check whether there's anything on them.

Who says "change in devices and redundancy"? Take a picture with your phone, put it on eg imgur.com, and post the link here.