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If you have a SIM card reader for SIM recovery or contacts synchronization, you may notice some weird behaviour on Windows 7.
Every time you plug in the reader, Windows begins to look for a driver:
This is strange, because you have already installed the driver once; and what is stranger is that despite the fact that Windows fails to find a driver - the SIM card manager still works properly!
The explanation is very simple: Windows doesn't try to install the driver for the smart card reader, instead it attempts to install the driver for the smart card.
Take a look at your device manager, and pay attention to the names of the sections. Notice that the smart card readers are OK (highlighted with green), while the smart cards themselves are marked as "unknown" (highlighted with red). [please excuse the mess in my system, there are many items there because my computer is a testbed for all my experiments]
So, what is all this about? First of all, it is not a bug, it is a feature of Windows 7. It attempts to load a minidriver for the smart card that was plugged in (yes, a SIM card is a smart card, so Windows reacts to a newly inserted SIM card in exactly the same way).
This may be needed for some smart card applications, but it is not needed for SIM card management software (our smart card security tools don't need it either). You have two options here:
How to disable smart card plug and play on Windows 7
After you reboot the system, the pop-ups that show up every time you plug in a smart card will be gone.
Another way to disable smart card plug and play on Windows 7 is to run this from the command line, with admin rights:
Reg add HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\ScPnP\ /v EnableScPnP /t REG_DWORD /d 0
Should I disable smart card plug and play?
p.s. those of you who already have SIM Manager, stay tuned for the upcoming release, it's new feature is deleted SMS recovery for the iPhone.
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