IPhone not visible in PC. How to solve that?

IPhone can't connect to PC. My jailbroken iPhone 4 accidentally updated to next ios version. Then I tried to restore my phone. But restore didn't complete. Then I was try to do do something ( settings - general - reset - ERASE All CONTENT AND SETTING) but erase can't complete, it's continue for 4-5 hours when Iphone off without charge. Then I try to plugin to the PC but can't visible in PC… Please help me to solve this…

It could be the porblem of Windoes in your PC. You can fix it:-

1. Open Start Menu >> Run and type services.msc and press ok [ this will open up services ]
2. Locate the service named Mobile Device Driver
3. Double click the service to open properties

4. In the "general" tab find the "startup type" drop-down arrow menu and make sure "automatic" is selected.

5. Also see the general tab to check the "service status". If it does not say "started" then click the start button to start the service and connect your phone again and click apply.

Note: If the above procedure does not helped in your case, then try restarting the service

or you can:-

1. Go to My Computer >> Manage and click Device Manager in the left tab.

2. Click Portable Devices >> Apple iPhone >> Uninstall
3. Unplug and plug your iPhone, now wait for windows to re recognize your iphone [ In Device Manager, you will see the new recognized Apple Iphone ]
4. Press F5 to refresh your windows explorer and your Apple iPhone will show up.