I still don't see another transaction in blockexplorers using that transaction's input. I'll be too late if you leave it that way.

If you used the coinb method, you need to broadcast it using the broadcast tab after creating the signed transaction.
It won't automatically broadcast after clicking "send"; copy the raw Tx, click "broadcast" tab and paste it there, click "submit".
Take note: you need to include the specific input's tx id for coinb to know the exact input to spend (it's in the online blockexplorers).

If that helped, you can keep the reward.

Guys, stop questioning the relation of the project with crypto if the only application you know is to use it as a storage.
The main purpose is written in the OP, non-AI based translations which will be manually done by users that will be be paid in crypto (Only tokens which is unconvincing).
The reason must be: most projects and developers prefer human translations than GT or other AI.

However TranslateME, adding "decentralized" to the name of the project just because it's crypto-related IMO sounds unimaginative and dumb in the eyes of digital currency "tech-guys".
As the matter of fact, I've seen too many projects promoting them as "decentralized something" that were too hilarious that most doesn't even made sense.

Paying in crypto will not make the project decentralized.

As far as I can remember, there were two Porn-related campaigns that had ran for a few months last year or last 2017.
One was handled by Yahoo (AFAIK).

Based form those, there shouldn't be any issue to the forum, DTs and the signature campaigners as long as the project is legal.
By the way, both were ICO-based startups; that said, the idea of advertising here in bitcointalk made sense.

You need to quickly "double-spend" the inputs before it get confirmed.
(luckily, the tx fee is too low and it's still unconfirmed)

I don't know the exact way to make a double spend transaction on core but you need it ASAP so try this:

• Enable "Coin Control" in the setings. (Tick "replace-by-fee" too - might be needed)
• Select the input used in that particular unconfirmed transaction.
• Then make a new transaction using it with different address and REALLY high transaction fee like 50sat/b.

This could be inaccurate or wrong.

---

-Edit-
Or use coinb.in's transaction push and generator to manually create the transaction.
Don't forget to make the transaction fee higher!
You just need to export the address' private key from core.

@HCP He stated that "it connect right away and shows all of my old transactions" in his PC Electrum so it's highly likely that the addresses were the same aside from that particular address which really strange, unless he imported it before (using old Electrum version with import function enabled on HD wallets).

Here's another possibility that I just thought of:
His Tails Electrum wallet got two wallet files and the "missing" address belongs to the second wallet, while the backed-up SEED belongs to the first wallet where his "old transactions" belong.

Great, just make sure that the PC Electrum version was verified and/or came from the official site (electrum.org) and you should be safe.
It's better of that way since it's super weird that your SEED failed to produce that particular address (even "ismine" command resulted in "false").

It happened to me back then (after updating from 2.9.3).
In my case, it's the last opened unencrypted wallet file that Electrum was trying to open on start.
It seems like it was corrupted by something after the update.
Luckily, it's not my main wallet and changing the "gui_last_wallet":" and "recently_open" in the config file fixed the issue.

In your case, if it isn't the dependencies, just delete the "config" file from "%appdata%/Electrum" to restore to default setting and select another wallet or create another wallet via restore SEED option.

It's showing Zero transaction because it isn't connected to any server and not synchronized.
You should confirm that the address belongs to Tails Electrum too though.

Have you tried exporting its private key as I said in my post above?

Layman terms again (requested to be moved to Beginners' Board).

In the simplest terms:

• Mainchain - When forks happen, two or more blockchains will/might be created by different set of nodes, the longest continued chain that has been abiding by the network rules is what is called "the Mainchain".
  Fork(s): Another blockchain(s) that became the result of nodes having different network rules or "settings" that produces different set of blocks, intentionally (fork coins) or accidentally (invalid mined block(s)).
• Onchain - As stated by HeRetiK, the term is widely used in Lightning Network primarily when stating about regular bitcoin transactions and opening and closing channel transactions.
• Sidechain - Any other blockchain that isn't related to Bitcoin's blockchain but benefits from it through different methods.

Have you imported an address/private key before?
If the Electrum's version was too old, importing private keys to an HD wallet is possible.

But whether yes or no:
I assume that you can still open that outdated wallet, so just Export the private key of that specific address and sweep it to a new wallet.

• Click "View", then "Show Address"
• Find the specific address, right click and select private key.
• Type your passphrase and the Private key should appear (do not share this to anyone)
• In the new wallet or you main wallet, click "wallet", then "Private key" and select "Sweep"
• Paste p2pkh:YOUR_PRIVATE_KEY to the text box, select a destination address (double-check if it's in the address list), then sweep.

With a Core2Duo and a GTX460, there are no other options aside from Minergate that stomachgrowls suggested or the one I will recommend you.

But I highly doubt that mining service's...~ service, beside the fact that you'll probably earn cents per day, most of your mining income will just go to the site and your "referree".
But you got no choice, most mining software won't even mine using that GPU.

Or Try to mine Cryptonight coins using this: [CPU][XMR] Monero CPU Miner
The author claimed that it's optimized for SSE4 processors like Core2Duo/Quad with 50% more hashrate.
The code was clean based from the last review but there have been a lot updates happened since then. (I can't vouch for the security).

Try to increase the Gap Limit to 50 if you already used more than 50 addresses before, 100+ if there are more.

Open the console (View->Show Console) then type this (change "50" to the needed value):
Then restart Electrum.

From the linked thread above (cold-storage format), I have mentioned about broadcasting the signed transaction to an online broadcaster.

Here's the detailed steps (you can do this while Electrum is offline):

• 1. Create a transaction, Sign it and Copy the Raw Transaction (HEX).
• 2. Click "save" to locally include the transaction to your wallet, thus (visibly) deduct from the last balance. (save isn't clickable if it wasn't signed)
• 3. Enable your internet connection, then Go to any blockexplorer that has a "Push Tx" feature like: https://pool.viabtc.com/tools/BTC/broadcast/
  And paste the Raw Transaction there, click send.
• 4. Wait for a couple of seconds and check the TXID (not the raw tx, the code above the saved transaction on your Electrum) on an online blockexplorer to confirm that the tx was broadcasted successfully.

Green Dot (connected), correct addresses and no history... that's weird.
BTW, First (your reply to bL4nkcode) and Last (your reply to me) responses were inconsistent.

Is the "block_headers" file in the %appdata%/electrum folder's size is greater than 44mb?
If it still isn't, just leave your Electrum open for a couple of minutes or an hour specially if your internet is too slow.

Also, you said about "don't know when you've lost your Ledger"... Was this before January-March 2018?
If it was, what kind of "Bitcoin" was deposited in your Ledger? Bitcoin [BTC] or Bitcoin Cash [BCH]?
Electrum only supports Bitcoin [BTC].

In use-case like that, either Lightning Network (no third-party) or a payment processor (w/ third-party) will be useful.
But currently, LN is still on its "testing stage" and still cannot safely utilize by huge retailers like Wallmart.

Read these articles about Lightning Network:

• What is Lightning Network (Infographic)
• What is Lightning Network (in text)

But hey, talking about "retail store" as in the person is physically there, CCTVs all around and guards on duty;
There's no reason for the person to double spend a transaction unless he wants to be locked in jail, so retailers can accept unconfirmed transactions in situations like these (with a minimum fee requirement to be confirmed within 10minutes).

Or just wait for LN-designed APIs and LN to be fully functional (with less to no bugs).

Do you have an antivirus?
Some AV will block Electrum because of a known false-positive virus detection.
If that's the case, temporarily tun off your AV and/or make an exception for Electrum to your Firewall and AV.

Regarding the receiving address, it will always display a new address in every transaction you make.
Try displaying the addresses tab (Click "View"->"Show Addresses") and check if the first used address is there.

There's no way for you or them to cancel a "confirmed" transaction, Bitcoin's transactions are irreversible.

You haven't lost any money as long as you haven't screwed-up with the backup (the 12-word SEED phrase) or downloaded a fake Electrum wallet.
All you need to do is to restore that SEED to any Electrum wallet installed to other machine/mobile if your PC was the cause of the synchronization issue.

Lastly, check on an online blockexplorer if the address(es) in the address tab have a balance by copy-pasting each address to the search box.

There's no reason for you to install Creator-ready-driver if you've already installed GRD.

The only difference is the optimizations for "Editors and Production" applications like Photoshop and others.
Under the hood, it's the same with GRD that still uses CUDA.
So hypothetically, it has pretty much the same performance with GRD when it comes to mining (so stick with the driver that was properly tested by mining software developers).

Here's another:
First enable the "Address Tab" by clicking "View" then click "Show Addresses".
If the addresses in the list are correct, there's a bad news.

Is there's something in the transaction history that shouldn't be there, or there's none at all?
If there is, what version of Electrum did you installed and where did you downloaded it?
If there's none, do the above posts' instructions.

Just really privacy, from the bad Electrum servers and the broadcaster site.

AFAIK, the Hacker's servers don't allow broadcasting transactions and will just result in the known fake error message (or successful broadcast with a fake error message).
If there's no error message, chances that it's a "good server" which doesn't participate to the attack is high.

If you can't get it to work with the instructions above and you're in a hurry, install Electrum to other devices like Android phone or Windows PC and restore from SEED.
Having the SEED does makes a difference, it can restore your wallet's addresses as it is, except from the history labels, settings and contacts.