USB not recognised. Hello laurencewithau,Error Code 4. Device Manager error that means the following Windows has stopped this device because it has reported problems. Code 4. 3When you get this error with USB devices its because one of the drivers controlling the device notified the operating system that the device failed in some manner. After some tweaking, I solved the error Error 720 on a Windows 7 machine connecting via a PPTP VPN. This is probably one of the most frustrating and generic error codes reported by Windows. When I say generic, Im referring to the fact that Windows is. This can be because of corruption in one of the loaded drivers and the driver cache just. Unplugging the computer sometimes doesnt resolve the problem because the battery still holds power. To fix this, unplug all of your USB devices, then turn off the PC and take out the battery This is assuming that youre on a laptop. PC set for about 5 minutes, then put the battery back in and restart the PC. Next, plug your USB devices back in one at a time and make sure that they work. Play Swf Files In Html5. If this does not work or youre on a desktop, follow the steps in this KB article. Error USB Device not recognized when you try to access a USB external hard drive. Mainly methods 3, 4,and 5 Thanks. Windows 7 Driver Error Code 43' title='Windows 7 Driver Error Code 43' />Lists the error codes that may be reported by Device Manager and the possible resolutions in Windows. How to fix a Code 43 error Windows has stopped this device because it has reported problems. An unspecified hardware issue is often the issue. In case this helps. I was having a similar problem on a new laptop Toshiba with Windows 7 Home Premium using wifi. Accessing a share on an XP desktop. Driver Magician is device driver backup, restoration, update and removal software for Windows.