To add to OmegaStarScream's reply:
Make sure you download electrum from its official website and verify the signature. (For more information, click here to read the guide provided by DireWolfM14).
For more secuirty, it's recommended to make your transaction offline (preferably on an airgapped device), especially if you have big funds. To do so, you need to create a watch-only wallet on an online device and a wallet with your master private key on an offline device.
Topic: I have xpriv - Extended Private Key (Read 26 times)
You can use Electrum for that. Run it then select "Standard wallet" --> Use Master key and then paste it there.
How to spend bitcoins stored in it.
Jump to: