Many thanks for your reply.
The webcam seems to be working again and just to test it out I tried clicking on its video settings tab and everything remained normal i.e. no BSOD.
The printer however is still not working - following your advice, under 'other devices' Photosmart B110 series is actually listed 3 times, all with a yellow triangle against them. I got the message saying 'Windows could not find software for your device. Visit website and check support'. Clicking on drivers at each listing it states 'Drivers not installed (Code 28)'.
I did try visiting the HP website and saved the model (B110a) 'Add a device' drivers to desktop, and clicking on it the program starts to visibly run and then disappears with nothing further happening.
Presumably i may need to uninstall the printer and try re-loading it with the original disc supplied? As it appears to have installed itself previously more than once during set up (probably my fault i guess)how can i ensure everything is cleanly deleted for a proper, clean re-install if that is indeed the correct way forward?