My HD crashed yesterday and I need to re-install Windows 7 when I get home. What would the procedure be for activating Windows 7? Is it like XP where I call and they verify that I have a copy and they give me a new key? I only have one upgrade disc.
"My HD crashed " Not much to work with here, what changes were made to hardware or software prior to crash? maybe it can be recovered without reinstalation. A restore to a previous date may be possible or a repair install.
In either case no activation would be needed.
If doing a clean install on the same computer and hardware, online activation will work the same as when you first installed it.