Personally I recommend use a Digital River .iso and clean installation: [URL] However you may call Dell Technical Support and request a Recovery USB however you need to  change ownership before contacting them to request media: [URL]
Where can I obtain a proper re-installation disc for an Inspiron15R-N5110 with any Dell additions to the OEM version? The m/c was purchased from a closing-down retailer 2 years ago so disc purchase at the time was not an option and the factory-restore partition appears to be corrupt. It belongs to a young teenager so my own 7 Pro. 32bit doesn't suit!
Windows 7 Home Premium 64bit