When has Microsoft ever forced someone to upgrade their browser?
This really happened, in about 1996.
I'm too lazy to recall the details, but my computer was unusable until I allowed the upgrade to complete. Multiple reboots, cancels, retries, etc.; I even pulled the power cord during the process at one point, to no avail. My work depended on using the currently installed version, so it mattered.
It was the thing that pushed me over the edge with Microsoft. I have recently eased off (I'm typing this on a Windows media center PC), but I STILL have a Microsoft-free server room.
(Actually, it's also Linux-free; go OpenBSD. And there's an AS/400 in there too.)