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[Solved]Lion not booting after installing RT73 WiFi kext File

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My specs Notebook:

HCL Notebook G38 CP

Nvidia 8200M G (Graphics)

Intel Celeron 2.27GHz

RALink Rt73 USB Wireless


I had been working on Lion 10.7.3 for over 2 months and everything was working smooth without Wireless driver, until yesterday i downloaded RT73 Wireless Kext from http://www.osx86.net...73_lion_gm.html and got Kernel Panic. Notebook rebooted automatically. however after Chimera bootloader loads, then it shows an error like "Header Read size 0, Incorrect Image Signature" and then goes into the Apple logo and stucks there forever.

I had tried with different Boot options like "safe mode" ,verbose mode, ignore caches, single user , but nothing happens it just stucks.

So please if someone could help me fix the problem..

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