Bugged/Stuck: Big Grapple, First Arctic Suit Battle

[tob]

[Playing on Windows 10, 64-bit]
When in the "Big Grapple" scenario, we can unlock the Arctic Suit, and we can pop the plug on the water tank, but we are unable to target Brainiac's robotic tentacles to freeze them and have Cyborg smash them (as the IGN walkthrough explains to do). There is snow on the floor, but we have an invisible barrier, and can't engage to defeat and progress. We can fire off the snow gun, but it has zero effect on anything, and again, can't actually target the tentacles.
We have restarted the game and the computer, to no avail.
Thank you.

[markrevell]

Try freezing the water with 'K' :)

[tob]

Solved:
Uninstalled game, deleted 'junk files', wiped 'free space' on drive to pseudo-random, ran 'defragment' on drive, and reinstalled game as the only active installation.
Now it functions properly.
Thanks.