Need help: Recovered encrypted wallet.dat has different password after recovery

[robotminer]

I have an interesting problem with a recovered and encrypted wallet.dat:
Was messing around with my wallets and accidentally deleted a wallet.dat with some BTC on it, which is idiotic, I know
When using Recuva, I could regain the same wallet.dat from about a month ago, and, luckily, Bitcoin-qt tells me the following when opening it:
"Warning: error reading wallet.dat! All keys read correctly, but transaction data or address book antries might be missing or incorrect."
The wallet loads (client rescans, which takes some time) and my balance is there. Some adresses and transactions are missing, but the balance is right!
Still, when I want to send coins, the password for decrypting the wallet seems to have changed! I know my wallet PW from that wallet for sure and didn't change it anytime. Tried so many variations anyways (didn't work), still I am sure that I KNOW the password, but it just doesn't work any more (maybe because of the recovered wallet.dat??). I used special characters and "Umlaute" (ü, ä, ö) in the passphrase; could it be that the problem is because of that?

Thanks in advance guys, maybe you have an idea to solve the problem.
Kinda shitty...was so happy to recover the wallet.dat and now cannot access and unlock it.

[1714858829]

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[roslinpl]

Kinda shitty indeed

Well there is a chance that Recuva couldn't recover 100% of origin file.

There is small possibility that this is a cause of password change...

I dunno what can I suggest ...

Bruteforcing your passwd would be not funny

Maybe try to export private keys and set new password while doing this ...
then try to import them again?

This will not work perhaps ...

[justbtcme]

Try using a different computer to load the wallet file on another bitcoin client. See if that works.

[roslinpl]

Hello OP, have you done it? Is it working?

I am asking because it is interesting and I want to find some solution for this problem.

[robotminer]

Hey, sorry for not responding. I will try this in about 5 days, since I am not at my home PC right now (where the wallet is).
Thanks for your suggestions!  Will report back!

[roslinpl]

Hey, sorry for not responding. I will try this in about 5 days, since I am not at my home PC right now (where the wallet is).
Thanks for your suggestions!  Will report back!

Let us know when you will try to recover it
and good luck!

[robotminer]

I tried everything, opening it on a different machine did not work at all, same for exporting privkeys: qt says it doesn't have the privkey for the adresses, which shows me that there seems to be a bigger problem than the "all the privkeys could be read" message suggests.
I kind of made my peace with it...my stupidity lost me some BTC 
Thanks anyways!

[roslinpl]

I tried everything, opening it on a different machine did not work at all, same for exporting privkeys: qt says it doesn't have the privkey for the adresses, which shows me that there seems to be a bigger problem than the "all the privkeys could be read" message suggests.
I kind of made my peace with it...my stupidity lost me some BTC 
Thanks anyways!

too bad

don't delete it. Maybe in few years you will bruteforce it in a speed of light

Think about good sie of this - this is hodling for your family .
And maybe one day ...

[robotminer]

True
Thanks for your help!