@Pelover, well, the seed is entered in a random order. So even if the computer is compromised the attacked still needs to try 24! combinations before cracking your password. So you will have enough time to create a new account as BurtW said.
In addition to that, trezors asks to enter random words from the dictionary in between the shuffled seed words.
However: should you make a mistake and have to enter re-do the whole process, the random words will be known to a keylogger, because trezor chooses
different random words every time. So the words identical between the 2 restore-processes (1 failed, 1 succeeded) will be the seed words.
With a 12 word seed theres only 12! = 479,001,600 combinations. So better not "try again" after a failed restore from seed on the same machine if you have a short seed like that... or just just 24 word seed to be safe.