USB Peripheral Failure to Communicate

How can I determine that my USB Hub is working properly? Device Manager says I have a VIA Universal Host Contoller that is identified to the system as PCI bus 0,device 7, function 2 and that 21% of the bandwidth has been allocated to it. How can I control the bandwidth being allocated to USB devices?

It uses three drivers stored in winnt\system32\drivers. They are uhcd.sys, usbd.sys, and usbhub.sys, and one addition driver winnt\system32\usbui.dll. What do these drivers do?

I also have a USB selfpowered hub that detects the devices attached to it. I understand that it chages modes from Control mode, to Interrupt mode, to bulk transfer mode. How can monitor its performance? How can log the DTR and see what files it uses?

It seems that the print job has been spooled and you need to clear the spool folder.

If the problem is the spooler why doesn't the Spooler work properly? On the Advance tab under Printer>Properties I have Spool Print documents turned on. Print immediately, Print spooled document first, and Enable Advanced printing are also selected.

How can I clear the print spooler? There is no command to clear the Spooler under Printer Properties, nor under File> Printer Setup. Disconnecting the power to the printer does clear it.

There is a folder called Spool in the System32 folder, and it has theree files in it: Spoolss.dll, Winspool.drv, and Spoolsv.exe. When I send a job to the printer I presume these are files accessed? How can I trace what files are being used?

Usually when a job hangs in the spooler, you can stop and start the print spooler in Admin tools\services. Then cancel the job.

Thank you for replying to my question. I found Print Spooler serice. I 'll use it the next time the printer hangs-up. I wonder what is causing the problem?

Have stoppped/started the Print spooler and closed/opened the Printer window; this cleared the Printer Window, however when I sent the job back to the printer, it did not print.

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