Crashing

Hello dear staff and players,

Sometimes when I play random dungeon finder, and generally in game, it happens that wow crashes. Out of blue and for no apparent reason. My friend told me it might be a problem downloading minimal, and I will download full client. Although if someone had experienced similarities with regular client, please share the problem and possible solution.

How problem occurs:
- screen freezes
- I can move my cursor, but I cannot click
- when I use ctrl alt delete to summon TM, I have to press windows key in order to get my cursor back - when I do, I have to search WoW by key 'W' in task manager and press 'Delete' key to crash process
- after I log in, I sometimes return to dungeon with team... and more often (which really drives me nuts) I get out of team and it resets for me

Best regards.

Alright, so I downloaded MoP full client.

It worked fine for half an hour, then it crashed. Whenever I open wow.exe it asks me to read ToS and accept/reject it. It makes all my settings go to recommended each time i log in. Also, it crashes as well, consistently.