Windows has stopped this device because it has reported problems code 43

Make sure you are using the correct driver for your operating system. You can download drivers for Windows 7 32-bit and 64-bit here:
Epson Stylus CX9300F Drivers Software

Note that this is a non-US-based website. Make sure that the language of your version of Windows 7 and the Epson driver you install are the same.

Most generally a bad update driver to the bluetooth device,,,,,
Code 43 Windows has stopped this device because it has reported problems

Windows has stopped this device because it has reported problems (Code 43).
Code 43 can be summarized in two words: driver problem.
I can't help you any more without knowing which Windows version you are using, but the Panasonic website is
http://panasonic.net/pcc/support/bfax/

Error Code 43 is a Device Manager error that means the following:
Windows has stopped this device because it has reported problems. (Code 43)
When you get this error with USB devices it's because one of the drivers controlling the device notified the operating system that the device failed in some manner. It will be of issue of the loaded corrupted drivers. You should reinstall the operating system or reinstall the drivers that doesnt have virus or file damages.

Code 43 Error Message

The Code 43 error is one of several Device Manager error codes. The Code 43 error will almost always display in the following way:

"Windows has stopped this device because it has reported problems. (Code 43)"

Details on Device Manager error codes like Code 43 are available in the Device Status area in the device's properties

rror Code 43 Troubleshooting

1. Restart your computer if you haven't done so already.
   
   There is always the chance that the error Code 43 you're seeing on a device was caused by some temporary problem with the hardware. If so, a restart of your computer might fix the Code 43 error.
   
   Note: Some users have also reported that powering off their computer completely (not just a reset) and then turning it back on has corrected their Code 43 issue, especially if it exists on a USB device. In the case of a laptop, turn it off and remove the battery, wait a few minutes, and then put the battery back in and start the computer.
   
   
2. Did you install a device or make a change in Device Manager just before the Code 43 error appeared? If so, it's very possible that the change you made caused the Code 43 error.
   
   Undo the change if you can, restart your PC, and then check again for the Code 43 error.
   

Code 43 Error Message

The Code 43 error is one of several Device Manager error codes. The Code 43 error will almost always display in the following way:
"Windows has stopped this device because it has reported problems. (Code 43)"
Details on Device Manager error codes like Code 43 are available in the Device Status area in the device's properties: How To View a Device's Status in Device Manager.

Cause of the Code 43 Error

A Code 43 error is generated when Device Manager stops a hardware device because the hardware reported to Windows that it's having some kind of unspecified problem.
This extremely generic message could mean there's a true hardware issue or it could simply mean that there's a driver problem that Windows isn't seeing as such but that the hardware is being affected by.

Error Code 43 Troubleshooting

Restart your computer if you haven't done so already.

There is always the chance that the error Code 43 you're seeing on a device was caused by some temporary problem with the hardware. If so, a restart of your computer might fix the Code 43 error.

Note: Some users have also reported that powering off their computer completely (not just a reset) and then turning it back on has corrected their Code 43 issue, especially if it exists on a USB device. In the case of a laptop, turn it off and remove the battery, wait a few minutes, and then put the battery back in and start the computer.

Did you install a device or make a change in Device Manager just before the Code 43 error appeared? If so, it's very possible that the change you made caused the Code 43 error.

Undo the change if you can, restart your PC, and then check again for the Code 43 error.

Depending on the changes you made, some solutions might include:

• Remove or reconfigure the newly installed device.
• Roll back the driver to a version prior to your update.
• Use System Restore to undo recent Device Manager related changes.

Code 43 is triggered when the device stops responding completely. So if it hasn't been disconnected it means that it has failed at a hardware level - it has died. Sorry, this is terminal, time for a new one.

As Microsoft states.
Windows has stopped this device because it has reported problems. (Code 43)

Recommended resolution

One of the drivers controlling the device notified the operating system that the device failed in some manner.

If you have already run the Troubleshooting Wizard, you might want to check the hardware documentation for more information about diagnosing the problem.

Code 43 Windows has stopped this device because it has reported problems. (Code 43) Recommended resolution

One of the drivers controlling the device notified the operating system that the device failed in some manner.

If you have already run the Troubleshooting Wizard, you might want to check the hardware documentation for more information about diagnosing the problem.

Try reinstalling the ActiveSync Software.

Code 43 Windows has stopped this device because it has reported problems. (Code 43)Recommended resolution

One of the drivers controlling the device notified the operating system that the device failed in some manner. For more information about how to diagnose the problem, see the hardware documentation.

On the General Properties tab of the device, click Troubleshoot to start the Troubleshooting Wizard