WBC (2, 3) do both crash from time to time, but both are known to run on W7, 8 and 10 (64x)
For W7 I would probably try WXP virtual machine, but only in case there will be too many crashes (what I don't expect)
Generally helps to set compatiblity to WXP SP2 and "run as admin", sometimes even this is not needed.
When I play like 3 hours in a row, map after map, both WBC 2 or 3 tend to crash on me, but I do save often (ALT+S) and after I reload, I always can finish respective map and play another 2-3 hours.
# of creatures + structures have something to say on the crash ratio (sometimes I created huge maps, put there tons of units and a lot of buildings, hoping for extra XP, but when I selected enemy AI Warlord or Emperor, and AI started to calculate all the paths and whatsnot, BAM! Also the fact that I am not a map creator pro has something to with it too :D)
Anyway, WBC 3 is a safe choice on Win 7 64x
(I play this game and it's mods for some years, I had W7 before and played WBC 3 a lot, now I have W8 64x and it runs just fine, despite the few rare crashes, only on GOG i have 21 hours played)