Update October, 2012
Windows 7 (32bit and 64bit) Support (Version 22.214.171.124)
The 5550 IP Console now supports functionality on current operating systems provided from Microsoft.
As of this writing, March 3, 2012, the Mitel 5550 console (release 126.96.36.199) is compatible
with Windows 7 32 bit. It is not compatible with Windows 7 64 bit.
Console version 4.0 is the first version to support Windows 7.
This is from Page 8 of the release notes:
does not support 64-bit Windows OS"
More can be found here on the forum:
Windows 7 and the Mitel 5550 Console
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