Here's the setup: ADSL Modem Router (D-Link DSL-502T) connected to a Wireless Router (Linksys WRT54G) which has 2 computers connected via wireless and 1 hard wired. Here's the problem: Up until last Thursday I was able to access all the web sites I desired, including many that I accessed everyday, eg my bank accounts, stock reports etc Last Thursday that all changed. Suddenly I can access only some of my favourite web sites - the unimportant ones! In some cases I can access the home page, eg of my broker, but cannot logon - always receiving a "Navigation to the webpage was cancelled" error message Also, I cannot send e-mails! But, thankfully, I can receive them. This problem occurred simulatneously on all three computers connected to my LAN. So, I can access: - http://www.microsoft.com - http://www.weather.com.au/nsw/bogangar/current - http://www.microsoft.com/australia/ - http://forum.majorgeeks.com/ (thankfully) But I can't access my - ISP: www.dodo.com.au - bank: www.citibank.co.th - bank: https://www.scbeasy.com/easy1-3/skin2003/eng/home.asp I've run: - A detailed AVG anti virus scan - nothing found - Counterspy - a few non critical tracking cookies found - Ad-Aware - a few non critical tracking cookies found - Spy Sweeper - a few non critical tracking cookies found - SpyBot S&D - a few non critical tracking cookies found - ZoneAlarm Antispyware - a few non tracking critical cookies found No trojans or the like found. I've checked the setup of:- IE 7 - AVG - ZoneAlarm - the DSL Modem/router - the wireless router I've checked Task Manager for unknown processes - none found I'm running WinXP SP2 (fully updated), IE 7 RC1, Outlook 2003, Postcast Server Pro (for sending e-mails), ZoneAlarm and AVG Antivirus and they are always operative and up to date. The other malware detectors i've run have all been updated before searching for the source of my problem. I used VisualRoute to trace some of the problem web sites with the attached results - all suggested Port 80 is being blocked. I've tried without success on both of the computers running Windows XP SP2(the third is running Win98 and is oh so slooow): - Shutting down ZoneAlarm and AVG Anti-virus - no improvement - Resetting my DSL Modem/Router and Wireless Router to factory defaults and resetting with only necessary settings - no improvement I called my ISP and their suggestion was "You got malware on your system" - they couldn't/wouldn't comprehend that three computers all suddenly suffered the same problem at exactly the same time, regardless of how they are/were used. (The Win98 machine only does streaming music from www.Live365.com - that's all it's good for now!) Can anyone shed some light on this problem - it's really beaten me this time and I'm getting desparate to see how my bank account is standing and my stocks are trading.