Phone not being detected on laptop

hi , well my phone is not being detected, i made assure that the usb cable is alright, usb port is not 3.0 and is fine good and is among working ports, after trying so much i changed pc , cable but the phone still remains same undetected, wherein if i restart my phone it shows installing mtp drivers and shows symbol to have patience post which it shows error,it is behaving this way only after the update to kitkat i guess, because before that it was alright.suggestions appreciated and thanks in advance
Solved!
Go to Solution.

To solve the issue, open Device Manager on your computer to reinstall the driver for your device while your device is connected with your PC via a USB cable.
Microsoft Windows Vista and 7 users
To open Device manager on your computer
Click on the Start button.
In the Search box, type device manager, and then press enter.
To reinstall the drivers for your device
Scroll down to the Universal Serial Bus controllers (USB section) of the Device Manager window.
Look for an MTP Device: Media Device, Unknown Device or any other reference to your phone. Click on this entry and choose "Uninstall" whilst leaving the device connected.
Wait a few minutes, and the computer will reinstall the drivers for the device.
Now, the phone is accessible via Computer/My Computer on your computer.
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