Yeah this is possible, but I'm not using my windows machine right now (I'm in linux). I'll go back home and follow up immediately, but to the best of my memory the options are in
Edit -> Preferences
After that I think it was in "Code Hints"
One of the options there has the solution to your problem.
Note on Dell/ASUS Machines
Dell and ASUS sometimes implement this 'feature' where if you press ", it gets autocompleted. This interferes with dreamweaver. Then the only solution is to simply turn off code hints.. sorry.. :(