Hey, I've had this problem before, and just now had it again from new comcast internet software installed on pc. going to the "tabs" section in internet explorer options WILL NOT FIX IT. it is a change in the WINDOWS REGISTRY that causes icq "new tab" page. The poster below said ICQ gave him some software, to fix it, maybe that works, but here's how to fix it WITHOUT installing anymore BS software on your machine (ICQ caused the problem to begin with, so who knows what kind of bad surprises come along with there "fixing" software"
Click Start (windows star button in lower left corner)
Click "Run"
Type: regedit (in the Run Dialog Box)
Navigate to the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\AboutURLs
Right Click on "Tabs" (in the right column)
Left Click "Modify" on the Right Click Menu.
In the "Edit String" Window replace the contents of "Value data" Dialog Box with:
res://ieframe.dll/tabswelcome.htm
Close the Registry Editor and restart Internet Explorer. Enjoy!