Thankfully I have now resolved my laptop problem!
So I thought I would let you helpful members know how I achieved it.
Firstly I followed your advise and did a System Restore which got my browsers back working but Outlook did not work.
Then I came across this helpful site:
http://www.intelligentanswers.co.uk/index.php?topic=6486.0
One of the contributors had explained previously what to do for a similar problem step by step so it's easy to follow.
Half an hour after I started the scan as instructed I rebooted and every thing was working as it should.
So thanks are due all round to theanswerbank and intelligentanswers.