Hi DeepDiver,
the site has been running normally, so the problem must lie with your computer or browser, have you tried deleting your cookies and internet files, to see if this solves the problem? Is alsat the only web site you're experiencing this problem?
Also which browser are you using, Internet Explorer, Firefox or other?
Might be worth running your anti spyware and anti virus to see if there is anything running on your computer that shouldn't be.
Also have you upgraded your firewall/anti virus and altered the settings or changed the security settings in your browser.
Best wishes
Mickha