HP Pro Book 640 INTEL Core I5 ​​4GB RAM 500GB HDD Refurbished Design The HP ProBook 640 has an all-plastic, no-frills design that feels a bit cheap but keeps all of the focus on your work. The lid is matte black with HP's logo in reflective plastic. When you open the lid, you'll see the 14-inch, 1080p display surrounded by a chunky black bezel, as well as the full, backlit, island-style keyboard with a number pad and a shiny silver deck. At 4.8 pounds and 14.9 x 10.1 x 1.1 inches, the ProBook 640 falls in line with the competition, size-wise. 


Ports
The ProBook 640 has a port for just about everything. On the left side of the laptop, you'll find a lock slot, CD / DVD drive and smart card reader. The headphone jack, a USB Type-C port, a DisplayPort, a pair of USB 3.0 ports, an Ethernet jack, a SIM card slot and an SD card reader are on the right.
Still not enough? If you're still clinging to that gear from the '80s, you'll be happy to find a VGA output and serial port on the back of the machine.

Durability and Security
The ProBook should be able to handle getting knocked around on your commute. HP claims that the ProBook 640 is MIL-STD-810G tested to withstand drops, dust, vibrations and shocks. Additionally, the ProBook includes a spill-resistant keyboard. The Best Laptops for Business and Productivity
It also has some built-in security features to keep your IT department happy. Models with vPro are available for remote management, and the computer uses TPM to encrypt sensitive data. Our Windows 7-powered review unit included a fingerprint reader. I was able to set up the reader easily using HP's Client Security software, but if you're using Windows 10, you could opt for Windows Hello.
The ProBook also includes HP BIOSphere technology, which can restore the system to a safe state if it is damaged or corrupted.