Please allow ~2-3 weeks to dispatch for quality control. Product images are for illustrative purposes only and may contain AI-generated content; they may not represent the final product you receive. Products are subject to the cosmetic grading policy detailed here.
If you are ordering a device that does not include a Windows 11 licence as standard, please check Microsoft's minimum system requirements to confirm if it can be upgraded later should you wish to do so.


HP ProDesk 400 G2 Small Form Factor - Certified Refurbished Desktop Computer
The HP ProDesk 400 G2 SFF features an Intel Core i5-4590 (4th Gen) processor running at 3.30GHz with Turbo Boost up to 3.7GHz, 4GB DDR3 RAM, 1TB HDD storage, integrated Intel HD Graphics 4600, and compact dimensions of 337mm x 100mm x 380.5mm, making it an ideal certified refurbished business desktop solution for professional environments requiring reliable performance in a space-saving design.
This professionally refurbished desktop computer delivers dependable performance for everyday business computing, office productivity tasks, light multimedia work, and general administrative functions. Perfect for small to medium businesses, home offices, educational institutions, and organisations seeking cost-effective computing solutions without compromising on quality or functionality.
Key Features & Benefits
- Powerful 4th Generation Performance: Intel Core i5-4590 quad-core processor with intelligent Turbo Boost technology ensures smooth multitasking and responsive computing
- Expandable Memory: 4GB DDR3 RAM standard configuration with upgrade capability to 16GB across two DIMM slots for enhanced performance
- Generous Storage: 1TB SATA HDD provides ample space for documents, applications, and multimedia files
- Compact Professional Design: Small form factor (SFF) design saves valuable desk space whilst maintaining full desktop functionality
- Comprehensive Connectivity: Multiple USB 3.0 and 2.0 ports, VGA and DisplayPort outputs, Ethernet connectivity, and audio jacks for versatile peripheral support
- Enhanced Security Features: TPM 1.2, BIOS password protection, and chassis lock support for business-grade security
- Tool-less Serviceability: Easy-access chassis design simplifies maintenance and component upgrades
- Energy Efficient: ENERGY STAR certified with 85% efficient 240W power supply reducing operational costs
Technical Specifications
- Processor: Intel Core i5-4590, 3.30GHz base (3.7GHz Turbo), 4 cores, 4 threads, 6MB cache
- Memory: 4GB DDR3-1600 DIMM (expandable to 16GB)
- Storage: 1TB SATA HDD with support for 2.5" and 3.5" drives
- Graphics: Integrated Intel HD Graphics 4600 with shared memory
- Optical Drive: DVD/RW SATA slimline drive
- Connectivity: 10/100/1000 Ethernet, 6x USB ports (2x USB 3.0, 4x USB 2.0)
- Display Outputs: VGA and DisplayPort 1.2
- Dimensions: 337mm (W) x 100mm (H) x 380.5mm (D)
- Weight: 5.9kg
- Power Supply: 240W, 85% efficiency, auto-sensing
Operating System Compatibility
This desktop ships without a pre-installed operating system, providing flexibility to install your preferred OS. Windows 10 Professional offers excellent business features, enhanced security, and comprehensive software compatibility, though it may require more system resources. Windows 11 provides modern interface improvements and enhanced security features but has stricter hardware requirements that this system meets comfortably.
Quality Assurance & Warranty
Every HP ProDesk 400 G2 SFF undergoes Reboot IT's comprehensive refurbishment process, utilising cutting-edge testing software to verify optimal performance. We've tested all features and functions to ensure complete operational reliability. As industry experts since 2001, Reboot IT's thorough testing process guarantees all units are verified refurbished to professional standards.
All certified refurbished units include a comprehensive 1-year warranty provided by Reboot IT, offering peace of mind and ongoing support for your investment. Our rigorous quality control processes ensure each desktop meets strict performance and reliability standards before dispatch.
Excellent Grade units show minimal signs of previous use with pristine functionality, whilst Good Grade units may display light cosmetic wear but maintain full operational performance and reliability.
Why Choose Certified Refurbished
Choosing certified refurbished technology from Reboot IT delivers exceptional value whilst supporting sustainable computing practices. Each unit has been professionally restored to meet original manufacturer specifications, providing reliable performance at a fraction of new equipment costs.
Transform your workspace with this dependable, professionally refurbished HP ProDesk 400 G2 SFF desktop computer. Contact Reboot IT today to secure your certified refurbished business computing solution backed by our industry-leading warranty and expertise.
Refurbished Computers - Cosmetic Grading Guide
Our supplier's refurbished hardware is typically graded either "Excellent" or "Good", however, some legacy products were graded under a letter grading system (A, B, C). Please find the definitions for each grade below and contact us if you're uncertain of a device's grade.
Used Smartphone / Refurbished Mobile Phones
"Excellent" Grade
Devices in this category appear like new, with very minor wear. Expect light or fine scratches on the screen that are shallow enough not to catch on a fingernail. The edge around the glass is virtually flawless, save for possible light scratching around the power port. The back plate may show light/fine scratches, including on the Apple logo, with any discoloration being minimal.
"Good" Grade
These devices are characterized by being fully tested and functional even if they have body scratches, minor paint chips, or a small hairline crack on the screen. Screens are free from dead pixels but may exhibit slight scratching from moderate use.
Refurbished Desktops, Laptops and Monitors
"Excellent" Grade - Laptops
Reserved for units that show barely any signs of previous use, these laptops may exhibit very minor scuffing or abrasions, associated only with minimal standard use. The keyboards show light wear, and importantly, the screens are pristine, free from any scratches, cracks, chips, dead pixels, dark spots, discoloration, or blemishes.
"Excellent" Grade - Desktops
Desktop PCs in the "Excellent" grade category are free from deep scratches, cracks, paint chips, or any broken/missing pieces, ensuring a sleek and almost-new aesthetic.
"Excellent" Grade - Monitors
"Excellent" grade monitors are for those who expect a display showing very little to no signs of previous use. With minimal scuffing or abrasions on the housing/frame and no imperfections on the screen, these units offer an almost-new viewing experience.
"Good" Grade - Laptops
"Good" grade laptops are fully functional but come with signs of more extensive use compared to Excellent grade units. This includes scratches on the laptop body, heavier wear on keyboards, and possible small dents or paint chips. Screens may show uneven light diffusion and subtle blemishes but no cracks.
"Good" Grade - Desktops
Similar to laptops, "Good" grade desktops may exhibit light scratches and more noticeable wear on the case compared to "Excellent" grade PCs. Small dings or paint chips might be present but do not affect functionality.
"Good" Grade - Monitors
Displays in the "Good" grade have been fully tested and are functional but may include body scratches, minor cracks, or a loose/wobbly base. Screens could display uneven light diffusion and moderate blemishes but remain free from cracks.
Legacy letter grading
Used Smartphone / Refurbished Mobile Phones
A Grade
- No chips, scratches or cracks on the front glass and housing
- No missing or alternative parts
- No sign of liquid damage
- Battery cannot be swollen
B Grade – Same as A Grade except:
- May have light scuffs but no chips or cracks
- Light scratches on housing or front glass
C-Grade – Same as B Grade except:
- Unlimited long shallow scratches on the front glass
- No chips or cracks on the front glass
- Unlimited scratches, chips/dents on back cover housing and corners
- Minor cracks allowed
- Customized housing and aftermarket covers allowed
Refurbished Desktops, Laptops and Monitors
A-Grade
- Overall excellent to very good cosmetic condition. Some may be pristine, others may have light scratches or minor blemishes
- Laptops may have some shiny areas around the keyboard such as the space bar, touchpad or touchpad buttons
- Keyboard keys will be in excellent condition
- Laptop and monitor screens will be blemish free
- Cosmetic blemishes will not impact the overall functionality or performance of the device
B-Grade
- Will have some cosmetic blemishes that include scratches and/or other imperfections
- Minor scratches and dents on the housing
- Laptops may have shiny keys or shiny surfaces around the keyboard however all characters will be legible
- Laptop and monitors screens will have imperfections such as minor scratches, minor chips and/or white spots. There will be no cracking on the screen
- Have the same warranty as A Grade
- Pricing will be cheaper than A Grade
C-Grade
- Same as B-Grade except may have unlimited scratches/blemishes on the screen
- May have cracks/chips or dents on the housing
- Have the same warranty as A Grade
- Pricing will be cheaper than B Grade