Hi All, Since the new Cluster environment (4 x Terminal Servers) which is running in Hyper-V we have been having no problems with our big copiers. But since the new Canon copiers have been installed. We been have problems with the cluster failing on us and crashing. As in everything just freezes and I would have to turn off the VMs and turn them back on again. Checking event logs it shows the following errors. CanonPrinterDriver3 Event ID 1 Each entry below is always different each time sometimes they will be the same but most of the time it will be one of the following below. Entry Function: DrvPrinterEvent, Base Address: 000000005DD80000, Exception Address: 000000005DEFE6C3, Exception Code: INT_DIVIDE_BY_ZERO Entry Function: DrvDocumentEvent, Base Address: 00000000678E0000, Exception Address: 0000000067B5315E, Exception Code: INT_DIVIDE_BY_ZERO Entry Function: DrvDocumentPropertySheets, Base Address: 000000005DD80000, Exception Address: 000000005DEFE6C3, Exception Code: INT_DIVIDE_BY_ZERO Entry Function: DrvDocumentPropertySheets, Base Address: 00000000678E0000, Exception Address: 0000000067B5315E, Exception Code: INT_DIVIDE_BY_ZERO So it seems after some more testing that the print jobs are printed and some of them stay in the print queue and takes up a lot of memory instead of releasing the print job it stays in memory until a point where there is no resources left so it crashes the Terminal Servers (in the cluster). It happens at random times too. No persistent pattern that I can see so far. I've had to create a script that allows the printer spooler to restart at certain times during after hours to clear any print jobs that haven't been released by the spooler. Things I've tried so far. Replaced printer drivers on DC which is used for the Printer Server. Have tried PCL6, PCL5, PCL5e, UFR from Canon (printer model is Image Runner C5035) Have just tried to install it locally on each Terminal Server just before and it just crashed straight away. So not sure what else to do here. Does anyone have any thoughts on what it could be causing this or if there is a way to stop this from happening? We just got them and its under a maintenance contract with CSG Print Services. We had Xerox Copiers before and had no issues at all. Anything else in that's in the Environment that is not in the Cluster e.g. DC, DC2 and another Terminal Server are fine.