It is compatible that is definite re why is all of the program working ie showing as green? I am on win7 as is my wife and heaps of users. Been on win 7 for years with no issues re compatibility. How long was it working before this message came up? Can you provide a pic of the message?
Is win 7 updated with all service packs (1)
I would call support I feel a full clean up and reinstall of mcafee possiblly required.
Run stinger and getsusp( add your email address to the preferences) from here as a precaution
That shouldn't be happening but I have to ask if this is Win 7 SP1 and is everything up to date? By everything I mean including IE9 & all its add-ons - even if you don't use it.
As Tony says a complete uninstall, cleanup, reboot and reinstall might help. See THIS FAQ. There may be remnants of an older version hanging around.
If I understand the problem you've described correctly, is that the the app *on the CD* is not compatible with IE9 (it is fully compatible with Windows 7). This is because the McAfee product app was written and pressed to CD before the full version of IE9 (i.e non-beta) was released.
The solution is to allow the installation from web download.