Hello, the Computer is clean, was used only 2 times when creating a wallet and when transferring to the wallet. Then immediately was turned off and lay off and without access to the network and the Internet. Passwords and key phrases were stored in a safe, access to them was not. There was a 2-factor authorization on the wallet, but no requests were received! Anti-virus protection was. What to do in this case. Transaction ID: b2ca903ecc76ad18b75c475d33561770f5c0cb740b5a39eab647eed1cbad3390
For the 2FA i deduct you were using blockchain.com wallet... if that was the scenario you should get a mail while the hacker uses the data from "Passwords and key phrases were stored in a safe", but still weird because if they had access to the safe then how they get the 2FA.
And here is the other option when you created the wallet someone copies it, you say the computer was clean, but I know some nice AV Bypass, so, is hard to know when a PC is really clean.
Option C... a cracker found your private key by luck. The chance of this is 0.00000001% or less, but it has a chance.
So, think about this 3 options. I can't imagine another scenario.