Download the Bitcoin Core wallet from the official website (https://bitcoin.org/en/bitcoin-core/). Click Download Bitcoin Core and choose the version suitable for your system.
Before installation, disconnect from the Internet.
Install/Start Bitcoin Core
When the installation is complete and started, in the welcome interface, be sure to remove the check in front of the trim option. Because exporting is not supported in trim mode.
After launching the application, create a new wallet.
Wallet interface
Create a wallet
Enter the wallet name, such as mybitcoinwallet, and leave nothing else checked. Click Create. The wallet is now created.