L2C

USB debugging is turned off permenantly / grayed out I have recently installed euphoria lollipop custom ROM on my sony xperia l c2105. Now am facing lots of difficulties over it. My phone inbuilt memory is tollay ruined. Now my navigation bar icons also stops working I can't able to switch between apps, minimize app, can't go back so I decided to roll back to generic os. But I can't turn on my USB debugging. It shows in charge mode and USB debugging is grayed out .This post helps you to turn your USB debugging.I have surfed in Google and found the results. Steps to turn on USB debugging when it is permanently grayed out. Step 1:  connect your mobile to computer via data cable. Step 2: drag your notification panel and click change USB mode. Step 3:  switch to MTP from charge only Step 4: now go to settings -> developer options. Now you can turn your USB debbuging on.

Disable USB ports on Windows PC via Registry With this trick, you can disable access to your USB(Universal Serial Bus) ports on your Windows based PC to prevent people from taking out data without permission or spreading viruses through the use of USB (pen and flash) drives.  To use this trick to  disable USB ports , follow the steps given below:- Click on  Start . Click on  Run . If you cannot find RUN, type it in the search box. Type "regedit" without quotes. This will launch the Registry Editor. Navigate to    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\usbstor. In the work area, double click on  Start . In the  Value Data  box, enter 4. Click on  OK . Close  Registry Editor and refresh your desktop. To re-enable access to your USB ports, enter 3 in the  Value Data  box in  Step 6 . Try it yourself to make your PC invulnerable from data theft and malware which spread through USB ports. This works on Windows XP, Windows Vista, Windows 7 and Windows