Can't save windows 7 to anywhere?

I am a Mac novice and tried to download a genuine copy of Windows 7 to my Mac. I wasn't sure how much partition to give Windows so I had guessed. Once I got through all the prompts I had to choose a place to save Windows to. None of them allowed me to? Not sure where I'd gone wrong here and ever since my Mac won't shut down without switching it off from the back!

I am a Mac novice and tried to download a genuine copy of Windows 7 to my Mac.

Click to expand...

Do you mean you're trying to install Windows 7 via bootcamp?
Which version of Windows 7?
Which model of Mac do you have?
Which version of OSX?

I wasn't sure how much partition to give Windows so I had guessed.

Click to expand...

How much did you go for?
Was this done in the Bootcamp wizard?

Once I got through all the prompts I had to choose a place to save Windows to. None of them allowed me to?

Click to expand...

Is this after the reboot with the windows disc in and during the Windows 7 install?
If so you should have seen a BOOTCAMP drive. It needs formatting as per the bootcamp instructions:
Bootcamp Installation guide
What error did you get?

Not sure where I'd gone wrong here and ever since my Mac won't shut down without switching it off from the back!

Click to expand...

Is this when you're in OSX or is this during the windows install?
Are you still able to get into OSX ok?

Do you mean you're trying to install Windows 7 via bootcamp?
Correct although not sure where bootcamp is again on my Mac?

Which version of Windows 7?
Professional

Which model of Mac do you have?
Latest iMac 21.5inch 4GB

Which version of OSX?
10.6.7

How much did you go for?
Can't recall, about a third?

Was this done in the Bootcamp wizard?
I preset this but didn't give me another chance to reset it when I tried again.

Is this after the reboot with the windows disc in and during the Windows 7 install?
After install don't think I got to the reboot stage

What error did you get?
I think it said there wasn't enough space, memory

Is this when you're in OSX or is this during the windows install?
When I'm in OSX

Are you still able to get into OSX ok?
Yes

Thanks for your response

Calum

Grab the latest Boot Camp Guide http://manuals.info.apple.com/en_US/Boot_Camp_Install-Setup_10.6.pdf
also note the Windows 7 FAQs
Boot Camp: Windows 7 installation frequently asked questions

Start the Boot Camp Setup Assistant in OSX and use it to delete the partition.

Restart the Boot Camp Setup Assistant and choose something around 20gb for the windows partition.

Follow the guide to the letter.

If you get any further error messages please make a note of them word-for-word and post them here.

Good luck

Thanks very much I'll give it a go.

Do let us know what happens.