The only change I have made recently is to Java. I have updated to vers 1.5.0_10. Per Sun Microsystems, I deleted & reinstalled, did all their tests. Java is working ok. Sun says they can do nothing else.
I contacted my insurance company, and they say there is nothing wrong with their site; that it must be my system.
I have run NAV, Kapersky, Panda, Ewido (now AVG), tried system restore, chkdsk etc. Nothing helps.
I have no problems on any other sites to date.