2. I saved the seed and PW in a notepad but my pc restarted and the file got corrupted - I tried to restore it in different ways but it didnt worked.
Password is something that you've constructed yourself, can't you just remember a portion of it or a list of possible passwords?
Because the only way to access the wallet is to bruteforce it either by yourself or a paid service. But without a hint, it's almost impossible.
(
be wary of newbies trying to "help" through PMs)
That being said, make sure to create a backup or two of your wallet file.
3. Is there maybe a way that I restore a file or etherium that contains the seed?
Electrum.... there's none, the seed is encrypted by the password and also the wallet file if "
encrypt wallet file" was ticked (
on by default).