The easiest way is when running Mac OS X launch the Boot Camp Assistant which you will find in the Utilities folder and follow the prompts to remove the Windows Partition.
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When I had problems with BC I went down that path but it did not work for me. As I had a full backup I took the safe option and went for a clean re-install.
I tried it again, but it failed. Kind of knew it would - it did before.
I will do a complete re-install I think, but reading through google pages, I just need my restore disk (the OS X install disk?) - Will do that definitely for sure.
I just want the BOOTCAMP dross out, and it just takes space for nowt. If bothered, I'd leave it, by doing that, I lose space. NO WAY. I only had 179GB of free space left on my MBP and I know why - it's all the Steam games that I had installed, and not all
of them are Mac compatible.
All that is needed is a straight flattening of the HDD, done so to remove
that blinking partition too, and to use Time Machine to recover my software bought for it.
THEN, I shall consider
Parellels after that, though I'm not too bothered at the moment.