you say its a PC, but the CQ57 model is a laptop
review here >>> <a class="postlink" href="http://www.techradar.com/reviews/pc-mac/laptops-portable-pcs/laptops-and-netbooks/compaq-presario-cq57-366sa-1058120/review" onclick="window.open(this.href);return false;">http://www.techradar.com/reviews/pc-mac ... 120/review</a>
TechRadar rating - 3/5
For
Decent peformance
Battery life
Build quality
DVD burner
Against
Screen could be sharper
Lacking in graphics power
No HDMI
Specs
Product Type - Notebook
Green Compliant - Yes
Hard Drive Capacity - 320 GB
Processor Manufacturer - Intel
Graphics Controller Manufacturer - Intel
Graphics Controller Model - Graphics Media Accelerator HD
Bluetooth - Yes
Wi-Fi - Yes
Optical Drive Type - DVD-Writer
Graphics Memory Accessibility - Shared
Webcam - Yes
Backlight Technology - LED
Product Family - Presario CQ57-300
Operating System Architecture - 64-bit
Processor Model - i3-370M
Colour - Black
Operating System - Genuine Windows 7 Home Premium
Brand Name - Compaq
all in all not bad for £100, although no HDMI out does let it down. It has onboard shared graphics too instead of separate grahics card, but again if you dont use it for gaming then its ideal for the price.
Just a bit suspect why he's getting rid for £100 though as he could still get £150-200 for it on ebay