Calm down everyone, he only has 12 6248R CPUs  :-X
The "288 processors" that he mentioned may be the total number of "Cores", since: 12CPUs x 24Cores each = 288 Cores

How about the "2FA key" that Electrum showed during wallet creation? Check if you have saved it somewhere.
(this is only an example, do not use):

Okay so the issue is Electrum can't create a wallet with multiple script (address) type, you'll have to make separate wallets with different script types.

The easiest way to find which ones to restore is to use "Detect Existing Accounts" during the wallet restore process
(in "Script type and Derivation path" window):


The script type(s) in that list are the ones that have at least one transaction history.
If there are two or more, you must restore multiple separate Electrum wallets for each script type in the result.
Electrum can open multiple instances BTW.

In Bitcoin Core - bitcoin-qt, you can click the "Choose..." button beside the 'Transaction fee' just below the 'send' tab.

If the question is for another wallet, please specify.

Are you using the GUI?
Because there's an "Enable Replace-By-Fee" check-box below the 'Send 'tab that will override the default and bitcoin.conf settings if it's unchecked.

Yes, Trezor's backup "Recovery Seed" is BIP39 compliant and will work with any client that supports BIP39 seed including its passphrase if you enabled it.

...set of words aren't always a seed phrase backup.

Have you tried the second in the list in my reply above (post#3)?
It could be a "brainwallet" and you've just imported the private key to Bitcoin Core.

Try to use this brainwallet generator on an offline PC: brainwalletx.github.io/#generator (download the source from GitHub link below)
Type your 10-words and see if the uncompressed or compressed address has any balance.
If any of it does, then you can import the private key to a wallet (like Bitcoin Core or Electrum) to be able to spend it.

It was removed in Bitcoin-qt/bitcoin-cli a few months ago, it's now accessible using "bitcoin-wallet" tool in the 'daemon' folder.
I have a post above with a guide on how to use the command:

What he mean is: If the "Last block time" in Bitcoin-qt has passed the year 2011, the transaction should be in your 'Transactions' or 'Overview' by now.

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Since you have more than one wallet files, I'd suggest you to disable "pruning" so you wont encounter issues when you need to load the other (or more) wallet files.
Uncheck "Settings->Options...->Prune block storage" to to disable it, then it will require more disk space (about 400GB+) because the full blockchain will be saved locally.

If you do not have the space, you should load them all now so the wallets will be scanned during the initial block download.
Copy the (renamed) wallet.dat files into wallets folder in the data directory: '...bitcoin\wallets' folder; if there's no wallets folder: to the 'bitcoin' folder.
Use "File->Open wallet" to load a wallet file; you can select a loaded wallet from the "Wallet:" drop-down menu at the right of 'Overview'.

Bitcoin Core never implemented any kind of mnemonic or seed phrase backup options.
The option has always been a digital backup which is a copy of the wallet file.

If it's Bitcoin Core, you should look for backups that has a ".dat" extension, specifically "wallet.dat".
Take note that not all .dat files are connected to Bitcoin Core.

Note: After using the command, the original wallet.dat will be renamed into the backup file and the "new" wallet.dat is the salvaged wallet.

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Rescan shouldn't take "forever" (days?) to complete with the average hardware unless the wallet has too many keys/transactions in it, should only be hours at most.
My guess is your Bitcoin Core have the "prune block storage" settings enabled which will require it to re-download and verify everything from start every time you load a new wallet.dat.
Check the settings if it's enabled (Disable: Settings->Options...->Prune block storage to).
After disabling it, Bitcoin Core will use more disk space (about 400GB).

But if you mean, "a few hours", it's normal.

Based from pywallet's results, --recover worked regardless of the segfault errors.
Check your --recov_outputdir= direcory for the results specially the recovered wallet.dat file that can be loaded to Bitcoin Core which has a similar name to "recovered_wallet_xxxx.dat".

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How about --salvage? It's a native recovery tool for corrupted Bitcoin Core wallets.
I have a reply above about it, just change the wallet path to your wallet.dat's directory.

I think you posted to the wrong thread.
Your reply seems to be a response to BitMaxz's reply in your thread: Help needed recovering old wallet from bitcoin qt (around 2016)

Try Bitcoin Core's bitcoin-wallet tool's "salvage".
"bitcoin-wallet" is in the "bin" folder inside Bitcoin Core's installation directory (where bitcoind and bitcoin-cli are located).

To use it, open Terminal, cd to the directory where bitcoin-wallet is.
Then use the command (provide the full path to the wallet.dat file):

It wont return with any response (unless it failed) but you will see a backup file (wallet.dat.xxxxx.bak) where the wallet.dat is located.
The new wallet.dat is the "salvaged" wallet.

-edit-
Updated the directory to match the latest version's

Probably, the reason for that is to minimize the number of inputs when sending funds.
Because each of the pool withdrawal will be counted as one UTXO which will be used as an input for your transaction, the transaction's size will increase as the number of inputs increase.

If your usual transaction can only reach 0.001 BTC or slightly more, then weekly may be enough for you (may have to use coin control depending on the wallet).
If you're not planning to spend it and will send it for later, then going for monthly is better so you'll only generate one input per month.

That's not a GPG key but the signature file for Electrum-4.1.5.tar.gz.

You should put the signature file (above) and not the GPG key; like you did in the second attempt.

Take note that Hash is a one-way function.
If you hashed your private keys, then there's no way to restore them from the hash unless the hashing algorithm that you've used is broken.

The "solved!" in the article is about the demonstration of Bitcoin's mining, in which the author is trying to generate a hash that starts with '0'.
The last hash starts with zero so he mined his sample block.

Okay, so that can be the potential solution for the various threads authors who claims that they have a "very old" electrum seed.

@Bennoko, if you think that it's really that old and the seed is empty when restored in the latest version, it's worth the try.
Install Electrum 0.3 by following ETFbitcoin's guide, restore the seed phrase, create a bunch of addresses in the receive tab, then open the electrum.dat file using a text editor.

Sorry, I mean, in the electrum.dat file.
If more addresses are requested in the receive tab, will the unencrypted electrum.dat file display as much private keys as in the receive tab?