I have the same iMac and I just can't get Bootcamp to install. I edited the bootcamp.msi file as suggested, tried "NOCHECK=1" and run from elevate command prompt but it still won't run.
@kinless = please can you let me know what you did to get it to run? I am tearing my hair out here!
(I have moved a Bootcamp installation over from another Mac - both Macs are mine - and have it up and running on an external drive, which has been a right pain to get this far. If I can just get the installer to run, I am hope and dry. I only have a couple of exclamatin marks in Device Manager, but one of them is USB3 support.)
Oh man that feels like forever ago now.
I believe the main issue (for me) was that there's 2 different graphics drivers when using VMWare Fusion. One is native for Boot Camp, and the other is for when using VMWare. I believe the installer didn't like the VMWare graphics driver so I booted into Boot Camp and uninstalled it from the Device Manager, as well as any drivers that had the exclamation mark. Only after this was installation successful. Once the new Boot Camp 5.0 was in and working, I then restarted back into the Mac/VMWare side and re-installed VMWare drivers, and restarted again to ensure success.
So in short, boot natively into Windows, get rid of the VMWare Fusion graphics driver and any/all drivers that have exclamation marks. I think the Boot Camp installer wants things in tip-top shape before it will allow you to install.
Of course, if you're not using VMWare, just focus on the problem drivers, but your solution may lie elsewhere if that alone doesn't work.
Thanks ever so much mate - really appreciate it.
As it happens, your suggestions didn't work though and were a bit of a red herring for me (but thanks anyway). I uninstalled every driver I could think of - and made the system unbootable into the process, which took blinking ages to sort out - but it made no difference.
In the end, I realised that the old Bootcamp Services was still installed from my Mac Mini, and although not running was still listing in Control Panel>Programmes and Features. When I tried to uninstall that, I got the same error message about this version of Bootcamp is not intended bla bla bla. Basically it would not uninstall.
So I tried the Microsoft uninstaller repair tool, which did manage to remove the entry in Programmes and Features. Whether it uninstalled the software, I have no idea.
But anyway, after that I tried running the Bootcamp installer again and guess what, it worked! So I now have a perfect Bootcamp installation, with all my programs and stuff on it, running off an external USB drive :-) Just what I wanted.
YES - FINALLY
12 hours after installing my new HDD I now seem to have a perfectly functioning version of Windows 7 on my Macbook Pro 5,1 Late 2008.
My pain and frustration with Boot Camp began about 2 years ago when I attempted to install it after getting fed up with Parallels Desktop. At that time, I received some form of HDD error (I can't remember the details but I assumed it was to do with the HDD being on its deathbed - luckily it survived for a further 2 and is still trundling on in its second life as a USB drive at the moment)
In the last 12 hours i've had to go through countless workarounds until last night i kept getting Bootcamp errors on windows and being unable to use the trackpad, audio card and graphics card as they were meant to be used.
At last - all good.
Now to install some games
This was exactly what I needed to get past the error message!
I do want to note for anyone doing a Windows 7 32 Bit install that you need to drop the Launch Condition from the BootCamp.msi and not the BootCamp64.msi to kill the error message for a 32 Bit install.
Thank you again GrovrM!!!