Doesn't the gray font with the address between brackets mean it's not confirmed?

That doesn't add up with this though:
Text is easier than screenshots, I typed this: 8202144d4cdb2340497c8a69ec805b27e49553f66da531c6c8f6a5eaa359751f, which doesn't exist.

Bitcoin was less than 2 months old back then. Any chance you bought the wallet instead?

What's shown in block explorers is definitely correct. If you don't see any transaction, it simply means that the address has never received any bitcoin.
Even if you download the blockchain and your wallet is synced, you won't be able to spend the fund which is not yours. The transaction you see in bitcoin core doesn't exist in the blockchain.

You didn't answer the question asked by LoyceV above.
Were you really mining bitcoin in 2009? Haven't you purchased the wallet file?

Don't worry about broadcasting your transaction.
First, you should know whether you have any bitcoin or not. If you really have bitcoin and you own the private key, you will be able to spend the fund.


From "blockheight": 4111
As I said above, the data you shared doesn't match the blockchain.


What's the name of the software?

Omitting the characters you have likely still makes you identifiable (especially since block hashes are quite easy to search through if you've got the blockchain in front of you).

You could try taking out the private keys and exporting them into electrum (from electrum.org) but if the address doesn't have funds on a block explorer, something else might be an issue (perhaps if you've spent the coins or the block didn't broadcast correctly).

You could also install an up to date version of bitcoin core for the best privacy but it might need a lot of time to sync and a lot of bandwidth.

I don't really understand what you mean by "it takes 10 years to update".
Are you trying to download the blockchain in bitcoin core and it says it takes 10 years to be synced? If so, it shouldn't take that much.


No.
Either you don't have bitcoin at all or you are looking at a wrong address.

According to the data you shared, the 50 BTC have been mined in the block number 4111.
Bitcoin generated on that block haven't been moved at all and are still in the address 1C7JtZUBeSPy7eZQ9vuCcaHRzYjKmnXACJ. This address doesn't match what you shared above.
The transaction ID you shared above is also different from the hash of coinbase transaction of that block.

Where did you take this data from?