Run antivirus software
Run Spybot search and destroy for adware/malware
Upgraded Adobe flash to latest version (10) several times also making sure i ran the uninstall application for the old version first
Set IE options back to default
Temporarily disabled firewall and anti virus in case it was blocking it
Ran continuous ping tests to check my broadband is working OK and not dropping packets
and many other suggested tweaks
My PC is quite old (6 years) but I really don't want to do anything drastic like reformatting it. I have so many applications that would need reloading and tweaks to make that it would drive me to insanity. Thanks for looking.