My laptop won't recognise or install my iphone 4

So I tried to plug my iphone 4 into my laptop to update the software, only when I plugged it in and tried to back it up on iTunes it said "iPhone can't be backed up as the device was disconnected" which it wasn't as my phone was still charging. I then unplugged the device and plugged it back in but this time my laptop didn't even register that my phone was plugged in. So I have borrowed an iPhone cable off my friend and have plugged it in to find that windows said my iPhone couldn't be installed properly so I went to devices and printers and I right clicked on the "Apple mobile device USB driver" and clicked troubleshoot, windows tried to fix it but failed and now is saying "MTP USB Device has a driver problem" and "Hardware changes might not have been detected" can anyone please help me I've been trying to fix the problem for days and I'm getting no where.

Go to Settings/Control Panel/Device Manager and look for Universal Serial Bus Controllers. Delete all entries named USB Root Hub. Connect your iPhone and it will be detected. If not leave it connected and restart your computer.

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