Blue Screen Problem

I recently upgraded my Windows 7 Home Premium SP1 to Windows 7 Ultimate, It restarted my computer and this
blue screen showed up.I turned off my computer using the button in the CPU then turned it back on after that
It worked properly but I posted this because I dont know if it is going to happen again when I turn my Computer back on . Thanks!

The Blue Screen INFO VV

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1

Additional information about the problem:
BCCode: 50
BCP1: FFFFFFFFFFFFFFFC
BCP2: 0000000000000000
BCP3: FFFFF88002D5CA68
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\071514-24835-01.dmp
C:\Users\Admin\AppData\Local\Temp\WER-162927-0.sysdata.xml

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NOTE:
I removed some information from what I think is important like Local ID.
If you need the Local ID information please let me know.

Which special additional expensive features did you need in ultimate that weren't in Home Premium? It's the exact same OS otherwise. Do you own an Ultimate license? If not I would reinstall the OS for the license you own.

Then work through the steps for Overcoming Windows 7 Installation Failures - Windows 7 Help Forums