There are several ways of preventing that automatic installation.
First you could disable autoplay for the NAND-flashdrive of your USB-dongle, so Windows won't automatically start setup upon detection:
- Open Windows Explorer or press the Windows + “e” key.
- Right-click the drive of the USB Drive. Then select Properties. Drive Properties will appear.
- Select the AutoPlay tab.
- Choose Select an Action to Perform
- At the bottom of the selection, click Take no Action, then click Apply.
- Click OK to exit Drive Properties.
Disabling autoplay however will only take effect on that certain computer, on which you performed those steps.
Alternatively you can disable the NAND-flashdrive so it won't appear on any computer by executing this AT-command on Huawei application interface COM port:
However disabling the NAND-flashdrive will also render the microSD-drive unusable.
The last and in my eyes the best method is debranding your E160 by running
this firmware update (originally intended for debranding a Vodafone-branded version of the E160 called K3565, but should work also for your's), which will upate your modem's firmware and replace the operator-customized version of Mobile Partner on your flashdrive by a generic version from Huawei. After running that update, you need to install that new generic version of Mobile Partner once from the flashdrive and you will never face autoplay execution of the setup again unless you remove that certain version of Mobile Partner from your system. Automatic installation will only be run if Mobile Partner is not present on your system or if there's another version installed.