Worries about restoring MacBook Pro to factory settings

[bookofmac]

I want to restore my macbook pro to the default factory settings as it has become a bit slow over the years and I want to start fresh.

I have:
2011 Macbook Pro w/ Mavericks installed. (It originally came with Snow Leapard) and I want to install Yosemite on fresh install.

I have looked up how to restore the macbook however many of the comments say that after they input their Apple ID to install the operating system a message comes up with "This item is temporarily unavailable, try again later" and then they are stuck.

Is this a common problem as I've seen quite a lot from people come up with it.
Thanks

 

[Fleetwood Mac]

Not a common issue as long as you add to your account in the MAS beforehand (make sure it shows in your Purchases section). If you plan to erase your machine and install from your Recovery partition there should not be a problem.

For extra piece of mind you might consider creating a bootable installer (on a USB key etc) following this KBase article.

 

[Fishrrman]

If you -really- want to "restore the speed" (with either Mavericks or Yosemite), I'd recommend you bite the bullet and install an SSD into it...