Hp probook 450 G5 HD and Ram replacement - YouTube
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Amazon.co.jp: HP ProBook 450 G5 15.6-inch HD High Performance Laptop Intel 8th Gen i5-8250U Quad Core, 500GB HDD, 4GB DDR4, USB Type C, Windows 10 Pro : Computers
HP ProBook 450 G5 Business Laptop, Intel Core i5-8th Gen CPU, 8GB DDR4 RAM, 256GB SSD, 15 inch Display, Windows 10 Pro, Refurbished Laptop