I need some help (error) downloading/installing lollipop on my Tab S 10.5

mxrider821

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Jul 8, 2012
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I rooted my tablet awhile back and did all types of things to it to make it that much better but now that lollipop is out I want to update. The problem is that every time i go to update it gives me an error message & says "The operating system on your device has been modified in an unauthorized way. Try downloading software updates using samsung kids on your PC, or visit a customer service center."

The question I have is how can i completely reset my tablet to factory files and settings? CAN YOU PLEASE PROVIDE STEP BY STEP INSTRUCTIONS. I know about hard reset and wipe cache during start up but I feel like theres more. Please help me out on this guys. thanks in advance
 

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