Bootcamp won't work, Keep trying everything!!!

[Kevsta26]

So I've been trying to install Windows 7 Ultimate on my MacBook Pro 15" Early 2011 running OS X Lion 10.7.3 and there's been no luck! Every time I go to bootcamp assistant and I try to make the partition for windows it works for a minute and then pops up saying

The disk cannot be partitioned because some files cannot be moved.

Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again.

I've tried a lot of things like repairing the disk, using iDefrag, making my own FAT partition which also fails, and doing a full restore from snow leopard back to lion using the sl disk. I did loose some harddrive space at one point and happened to delete my Recovery HD to see if that would fix the problem, which it didn't, so I just recently reinstalled OS X Lion from the App store and now I have all my harddrive space back and the Recovery HD... I'm just really stuck and have been trying and trying for days to fix this, but there's no luck Please help, Thanks!

 

[r.j.s]

You tried a lot, but you didn't do what it said - which is the only way to truly avoid that error.

 

[Kevsta26]

Well I don't have anything to back up the drive, and I've reinstalled the entire computer with the Snow Leopard Disk without backing up at all and loosing everything, but I still have this error? Maybe I should try it again?

 

[simsaladimbamba]

What about a simple Clean Install deleting the entire HDD*?:

To create a Clean Install (formerly known as Erase & Install) of Mac OS X 10.6 Snow Leopard (the 29 USD Upgrade DVD is a fully working retail version of Mac OS X and does not need a prior installation of Mac OS X on the Mac), follow one of the following guides:

• Short version: Clean Install of OS X 10.6 Snow Leopard
• Long version: Mac OS X v10.6 Snow Leopard: How to Erase and Install

*

How to format a new HDD to install Mac OS X onto (or make a bootable copy onto)​

 

[Kevsta26]

Would this work with the Lion Recovery HD? or do I have to do this with the Snow Leopard disk and then Update to Lion later?

----------

I guess I could do a lion clean install http://mashable.com/2011/07/20/lion-clean-install-guide/

 

[NoamGM]

I had the same error and this solution worked out for me:
https://forums.macrumors.com/posts/14170444/