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Dell Optiplex 745: How to Reset BIOS CMOS Battery - YouTube
Restored Dell OptiPlex 755 Tower Desktop PC with Intel Core 2 Duo E7200 Processor, 4GB Memory, 1TB Hard Drive and Windows 10 Home (Monitor Not Included) (Refurbished) - Walmart.com
Dell Optiplex 755 Tower Cse Windows 10 Core 2 DUO 2.66GHz 3GB RAM 250GB HD DVDRW | eBay