Suddenly I can't open webpages asking for ID or passwords (emails, chat, msn, sites). After login and click "OK", these pages don't load. Few minutes waiting (supposedly loading) and then they appear blank (no message on screen) Other pages (no ID nor passwords needed) works fine. Reinstall Windows (XP SP2 HEd.), Firefox (3.5.2), Internet Explorer 7 doesn't fix it. Turning off ZoneAlarm either. Cookies are ON. No changes in settings recently. Scan with Avast HEd., Spybot SD, Spyware Doctor didn't show anything. Running ZoneAlarm Free Ed. (8.0), Avast HEd.(4.8) while on line. Any idea? TIA

Try a live linux cd and see it works. If so then your OS. If not then network. Playing to the angels Les Paul (1915-2009)

Great !! What about this... "Buy a new computer..." If works is the older one. "Try another address..." If works move home. Anybody can give me a more specific answer? After all this is a WinXP forum, isn't it? TIA

Just reinstall XP w/o format will keep the original settings. Try reinstall XP with format the HDD. This case usually only happen in PCs among company that it related to the authentication and synchronization problem between servers. To make a blrand new XP image should fix this problem at home.