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I have a weird issue which only occurs on some pc's. On all systems in my company and of the very most customers the issue does not exist.
There is just a little number of customer systems (Win10-64) where the problem exists. In some cases it is so that the reporter has the problem whereas his colleage with the same hardware equipment does not have the problem.
I issue an IOCTL via DeviceIoControl to a KMDF driver and it returns with the code 87, which is 'invalid parameter'.
I added a debug message in the driver to show each received IOCTL. And it shows that the driver does never see the IOCTL.
Does anyone have experienced something like this?
Any hints are very welcome.
Please ask for more details if required.
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