Update: This one turned out to be a cartridge had emptied during cartridge replacement it seems to be a common problem with refilled cartridges of a this type if not left to rest over night before installing.

Update: Before we arrived the customer had ran system restore and this had got the internet security in to a bit of a mess, the add remove programs and the AVG removal tool would not work , so we removed all the temp files and application data, ran the Windows Install Cleaner and was then able to attempt a reinstall of the program, once installed the firewall failed and got stuck in a reboot loop, this seemed to be going no where fast so we removed the program and reinstalled the AVG Free which worked first time.

We also realigned the Brother DCP585CW whilst here as the print out appeared to have a blurred shadow in normal printing mode, with adjustment this appeared to be better, with Fine mode looking perfect.

Update: Whilst here we tested the HP Deskjet F4580 Printer and found that its wireless is faulty, the BT Infinity is working perfectly, the wireless on the Dell 1545 Laptop was functioning but not at full speed only downloading at 20 megabits per second, whilst cabled and on my wireless test phone it produced above 35 megabits on download. we also updated the customers antivirus to AVG 2012 which found an uninstalled virus in the downloads folder called Trojan Horse Cryptic.BSC, luckily it seems it was downloaded but not running. (several faults occurring here )

Update: After checking the memory and the hard drive the only option we had was to reinstall Windows XP and updated all drivers. We then backed up all the data in case off any further issues.

Update : We tested this one with the -extoff extension and it worked fine so we  removed incompatible addons and removed unneeded toolbars, and this solved the customers issue, we then also ran a malware check to make sure the computer was clean.