Reindexing blocks (5 years...)

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How did it work for you?

Worked so simple which i have fear about his securance.
It's really secure?

Yes just keep your seed safe
You could generate a new seed with 2FA for added security! 

I don't know nothing about it. Can you explain, please?

You can read more about Electrum 2FA here http://docs.electrum.org/en/latest/2fa.html

Thank you. Tryed this one but not work's on windows as they say in donwload page

"Note: The QR code scanner is not supported in Windows binaries"

I'm using linux, sorry didn't see that :p

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Anyone can tell me an online secure wallet to avoid these problems?

Choose your Bitcoin wallet