I cannot enable find my mac

As the title says, I cannot enable find my mac, i am running 10.8.2, and cant see any updates in the app store,
I've looked up some things and I think that my recovery hd isn't up to date, there is a patch for updating you recovery hd, but only for 10.7,
Any ideas on fixing this? I read that rerunning the mountain lion install would recreate the recovery hd (question: would i lose my data?), but when i try to run it it says:
this disk isn't using guid partitionlabeling, change it with diskutility, but in diskutility i cant find a way to change this..
thanks for the help

You have a very strange partition table because of three reasons:
It's MBR, and you need a GUID partition table.
You have the Boot Camp volume above your OS X volume.
You have three partitions on your hard disk, and Boot Camp only allows two partitions on the hard disk.
You need to erase the whole hard disk, so you have to make backups. For OS X, you can use Time Machine to back up your hard disk or you can use Carbon Copy Cloner to make a clone on an external disk. For Windows, use WinClone. You will need an external disk, so if you haven't got one, you should buy it.
Then, to install Mountain Lion, as you haven't got the Recovery HD for Mountain Lion, you can use Lion Diskmaker to copy the Mountain Lion installer onto a DVD or USB drive.
After doing all those steps, follow these ones to install Mountain Lion again on a GUID partition table.
Open Boot Camp Assistant and delete the Boot Camp partition. If it doesn't allow you, skip this step.
Insert the USB drive or DVD with Mountain Lion, press Option key while your Mac is starting and choose the DVD or USB drive with Mountain Lion.
OS X Utilities window will appear, so open Disk Utility. Here's when the fun starts.
Select your hard disk at the top of the sidebar and go to Partition tab.
On the window, choose "Options" and select GUID Partition Table. Then, press OK.
You will return to the Partition. Select each partition one by one on the bar and press - button until all disappear.
Then, press + button, choose "Mac OS Extended (Journaled)" in Format and press Apply.
When it has finished, close Disk Utility and install OS X. It can take from 15 minutes to 30, depending of the disk you are using to install Mountain Lion and if you are installing it onto a HDD or SSD.
When the installation finishes, restore the backups so you will leave your Mac as it was before erasing the disk

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