Hello All,My Win XP SP3 suddenly developed a fault when I try to print: Document Failed to Print - Error communicating with printer.Printer - Canaon Pixma MP 610 - is 6 months old which hitherto was working fine.Control Panel shows printer as Offline as a default state. Right clicking and selecting bring printer online does so and then it is listed as ready but still does not print.The following do not help:Switching printer off/on Unplugging and replugging USB cable windows says New hardware detected but it lists it as unrecognised hardware. Trying to install driver from .inf file - windows says No driver found that iscompatible with this device.Rebooting compunintalling / reinstalling drivers - printer is listed but greyed as defaults to offline.does not print from DOS or any program inc notepadWent and bought new printerand new USB cable- same problem - hardware not recognised - money wasted.Printers are good and work fine when connected to other comps.Tried the hotfix from MS website http://hotfixv4.microsoft.com/Windows%20XP/sp3/Fix144808/2600/free/226205_ENU_i386_zip.exe)- No help.In device manager\hardware - printer listed as unrecognised device - refuses to update driver as said earlier even thru .inf fileIn printer properties checked that USB does not go to standby - no help.Checked: Services\PrintSpooler - Running - restart - no help.Edited registry : "Create a new registry value that prevents an OHCI controller from entering a suspended state" - No helpALSO ; comp now does not recognise any memory stick when connected USBUSB only sees Mouse and a card reader.All USB hubs are listed as working normally in device manager- No yellow icons anywhere device manager.All drivers from windoes update are up to date.Please help me if you canI am at my wits end.Thanks un advance RegardsBayan2 people got this answerI do too

bayan,hi, the same thing happened to me last Friday, 20th November. differences are:-1.I am using HP 7590 printer; and2. the usb device shows as "Unknown Device" and that no driver is loaded....Have you resolved the problem?thanks,ursulaJohnKelly46 had the answer - he said to unplug the power supply from the computer. He said that you must unplug it from the power board and wall socket. [ just turning off the computer is not sufficient]. Wait a few minutes. Then, connect the power supply back to the computer. After windows started, all of the hardware reinstalled one-by-one.... pls see John's detailed answer at thread "USB drive not accessible"

I am really grateful for your reply.That is indeed what happened. I had to unplug the computer and took it to a repair shop (a lot of hassle as you can imagine!). When he connected it all up it worked!!Looked like a fool then.!So that may well have been the answer to disconnect from the power supply completely then reconnect.Thank you so much again.Bayan

I have the same problem with SP3, but my printer is a Lexmark all in one P3120. I also tried all that you mentioned, including a chat with Lexmark support, who said that the drivers needed for SP3 are Vista drivers and the printer I have does not work with those drivers.Has anyone been able to solve this?

MerleeDoes your computer see the device when you plug it into the usb socket?Does computer recognise it as a printer - Lexmark etc but fails to find/load driver for it?Bayan