First is that you won't be able to access the site if you're using a browser other than IE so close that other browser first before trying to get to the update center.
Second is to make sure that in Internet Options (of IE in Control Panel), check to make sure that IE is set as the default Program....even if you change it again later to the browser of your choice.
Third is to try doing a 'repair' of IE6.....go to Add-Remove Programs, locate IE6 & Internet Tools, click Remove, and in the choices given in the next menued window, choose Repair.....then reboot the computer and see if that works now for the update center.
Fourth would be to do a new 'setup' and installation of IE6 so it can repair/overwrite any corrupt files that couldn't be fixed before. Try doing a search for a file called ie6setup.exe and then be on the internet when you click it. You should see a download/install window pop up showing the progress of this 'new' install.
Ever since i reformatted my pc, i wasn't able to access windows update. the same goes for microsoft update too. whenever i click the link on the start menu or type in the address, it just loads for a few seconds and then it stops loading but on the bottom of the ie windows it says "done". i've tried updating to sp2, enabling activeX, and adding the links as "trusted sites" in ie but none of them seem to work. how can i repair this?