Solved: Webcam in Lenovo Thinkpad not working

The webcam in my T420 suddenly stopped working. Tried the following:

F1 to access Bios. Under 'Security' the 'Integrated Camera' is enabled.

Under Windows Live Movie Maker: Displays 'No Webcam was found.'

Under Device Manager there are no 'Imaging Devices' listed so I can't update the drivers.

Lenovo Easy Capture tells me 'Failed to Open Camera'

Skype Tools>Options>Videos says 'Skype couldn't find a webcam.'

Have installed the 8aca15ww.exe Integrated Camera Driver.

Edit: thanks to those who looked at this post. As you probably guessed it's a hardware failure, and I've just taken it to Lenovo for service.

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Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz, Intel64 Family 6 Model 42 Stepping 7
Processor Count: 4
RAM: 3979 Mb
Graphics Card: Intel(R) HD Graphics Family, 1797 Mb
Hard Drives: C: Total - 459437 MB, Free - 267232 MB; Q: Total - 15999 MB, Free - 4113 MB; S: Total - 1499 MB, Free - 1162 MB;
Motherboard: LENOVO, 41772VB
Antivirus: avast! Antivirus, Updated and Enabled