Thank You DrUnicode! That was the cure! I have uninstalled IE10 and everything is back to normal now. I've changed my Windows Update settings to "Check for updates but let me choose whether to dowmload and install them." When the IE10 update comes up again I'll hide it so I won't be continually reminded to update it.

Once again, sincerely, thanks to everyone, all your help and advise was much appreciated.

Dave W