He who lives by the sword dies by it… M$ locked big business into using IE6 long ago and now finds the lock-in is so powerful it prevents big business from using “7”… Chuckle.
“web browser specialist Browsium, which said 80 per cent of big companies – those with 10,000 or more PCs – are still clinging to Windows XP even though support for it is due to end in two years. But IT department bosses fear the cost, difficulty and disruption of moving business-critical apps from Microsoftâ€™s Internet Explorer 6 and 7, which are off-limits on Windows 7.”
There are lessons to be learned from this. Why not rewrite those web applications in FLOSS and use FLOSS clients to prevent a repetition? I recommend Debian GNU/Linux on clients and servers because it works for you, not M$.