You use your gupdate.gcd from your nuvi and create cure FW with kunix tool and also you create original FW from your gupdate.gcd.
Kunix cure tool is for all nuvi if you read theme you will see.
You have virus on your PC becouse nuvi dont use boot.exe.
First run som antivirus app and clean your PC.
Here is cure and original FW for your nuvi:
[Only registered and activated users can see links. ]
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