BSOD and Language Change Problem

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Hello,
I have a problem. I buy a LenovoB50 brand new from the German amazon. And it was with German language on it. I search how to change it because the windows was 7 Pro.
And i use this solution

Download the MUI (Multilingual User Interface) for your Language. I downloaded the hu-HU package on C:\lp.cab. You have to change the path and language shorthand to your own

After the download completes, open a command line prompt as administrator and type

DISM /Online /Add-Package /PackagePath:C:\lp.cab
bcdedit /set {current} locale hu-HU
bcdboot %WinDir% /l hu-HU

Open regedit.exe and delete the en-EN key under

HKEY_LOCAL_MACHINE / SYSTEM / CurrentControlSet / Control / MUI / UILanguages

Reboot

Ok. Good.
But i dont have a disc for reboot. And when i start the laptop... it shows Lenovo's logo and the ,,Windows error recovery,, .And when i press start widows normaly it shows blue screen for 4 sec. and then the computer restart and shows the same thing
PLS HELP ME !!!!!!