OS X Yosemite Download Upgrade Install Later - macos

Why is the OS X upgrader so bad?
Once the OS X Yosemite upgrade is downloaded, if you restart the machine you have to download the whole thing again, in order to get the "Continue installation of OS X Yosemite ..." window to come back up.
Is there a way to install on a separate occasion to downloading? This is seriously frustrating because i just restarted since i couldn't get the window to appear, only to notice the window was hidden behind "App Store" once reboot was already initiated. After restart however it is not possible to get the upgrade window back.

Your question seems unclear.
After you finish your download of osx 10.10 and start the restarting process the downloaded file is installed not redownloaded. From the sounds of it you have already updated to 10.10 and if that is the case you can not get the update window back.
If you are having a lot of issues with your download, you can reinstall the entire os through internet recovery by turning off your laptop, holding command R and turning it back on
good luck

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OS X 10.10 install can't verify (Registered developer)

Well this is embarassing...
I'm a college student with an apple developer's license.
I'm currently stuck in the CMD+R recovery partition.
I installed 10.10 successfully earlier today. Then I got the bright idea to format my drive and do a clean install of Yosemite. When I clicked the 'Reinstall OS X' button in the recovery screen I recieved a message telling me that my computer cannot be verified with apple. I'm guessing this is because the recovery drive cannot recognize or download/install my developer certs.
Any ideas on how I can fix this? I'd prefer to install 10.10 but I'll roll back to 10.9 if absolutely necessary.
EDIT:
I solved my problem by doing an internet recovery (Cmd+Opt+R at startup). From there I installed 10.8 and re-installed 10.10 from the mac app store.
If you downloaded it from the developer site, you should have went through redeeming a code step, then Yosemite should be in your purchased app list. Are you sure you are using the account you redeemed the code? If you get the image from someone else, you probably want to redeem the code from the developer center.
I was able to get a clean install by booting to an external Mountain Lion disk and running the installer from there. More info: http://themainthread.com/blog/2014/06/clean-install-yosemite.html
I solved my issue by re-installing 10.8 onto my main partition and updating to 10.10 from there.
Since apple has not released OS X Yosemite to the public they can't verify the software because the recovery mode disk utility is for non developers, the software is not in the apple system yet. You should just make a bootable usb and do a clean install of OS X Yosemite.
Items to try:
1) Repair Permissions (better if booted into Recovery HD)
2) Resync time with Apple's Servers via System Preferences
...if all else fails, you can nuke and pave, or create a bootable USB installer.

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25/12/13 12:48:21.478 PM com.apple.preference.security.remoteservice[1595]: CoreLocation: CLInternalSetLocationServicesEnabled failed
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Thanks

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