I´m having big trouble with two IBM Thinkpad Laptops. It started out as a blue screen turning upp giving the error message IRQL not_less_or_equal - and then it forces a reboot. Well, since then I´ve restored the computers to factory settings many many times, since it seems to be lika a lottery if the restoration works out or not.
I finally got them up and running, but the problem now is that they are not able to detect plug and play devices. For example when I plug in different kind of USB-devices they do turn up in device manager as a blue warning icon or a question mark - but the system doesnt install it automatically or notify the user about it. How ever I am able to install the devices manually from the device manager.
In the event logs there is an entry where it says: "Plug and Play user interface dialogs have been suppressed in factory mode." with the event ID: 270
I didnt find much useful information on microsofts webpage, but I did find an forum post about a similar problem.
In that case, the problem was solved by using a microsoft utility: "sysprep.exe" to activate the plug and play function. But when I tried that, the computers stopped working. And suddenly I couldnt boot up the OS at all. But I reckon that this problem has something to do with this error message in the event loggs.
I have also checked that the Plug and Play service is started and running. I also did a "sfc /scannow" without any difference.
Also tried restoring the BIOS to the default settings - and updating to SP3.