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Hi! First of all, ignore your DMs. They are all scammers.
Now, in your question. Your Crypto are not stored on your PC or your Ledger, but on the blockchain. The thing that is stored on your Ledger, is your keys.
So, the only way for someone to steal your Crypto is by having the physical device and your pin or by having your 24-word seed phrase. Now, you should store your recovery phrase, by writing it down, on paper or steel (never online), and secure it safely. So, if you don’t have your recovery phrase stored digitally (and you shouldn’t) in any file on your PC, you are safe.
Also, it is good to delete the Ledger Live app. They can’t steal your Crypto by looking at it, but if they see it they will know that you have Crypto, and if they can surpass the password they will know, and how much exactly. So, for your safety (because you don’t know who these technicians are), it is better to not have info like this.