When I logged out of ICQ 6.5 an hour ago, it failed to quit properly. Then when I just logged back in and answered NO to the "do you want to upgrade ICQ?" question 4 times, it downloaded the fucking upgrade anyway and then wanted me to click to install it now. Of course even if you say NO, it'll install it the next restart anyway.
What I did is navigate to programfiles/icq6.5/Upgrade and delete the upgrade file, then I made the folder hidden and read only. This might work to prevent forced upgrades. More likely if you dont want to upgrade, you'll need to delete the upgrade file each time it downloads before you start up icq.
I really hate the forced bullshit which will include forced bookmarks, forced desktop icons, forced aol install.. all kinds of forced shit that no human on any planet would want.
If you use a third party program to connect to icq, no doubt you're having trouble because ICQ is trying to force itself into you.
