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HP ProBook 4540S 15.6" Standard USED Laptop - Intel Core i3 3110M 3rd Gen 2.4 GHz 6GB SODIMM DDR3 SATA 2.5" 320GB HDD DVD-RW Windows 10 Home 64-Bit - Walmart.com
HP PROBOOK 4540S LAPTOP INTEL CORE i3-3110 2.4GHZ 4GB RAM NO HD NO CADDIE | eBay
Review HP ProBook 4540s Notebook - NotebookCheck.net Reviews
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HP ProBook 4540s Intel Core i7-3632QM 2.2GHz 15.6" Windows 7 Professional 64-bit Notebook - Newegg.com
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