Had a blackout and now my computer cant even open my Colossuscoin CV2 and Cryptojack wallets, I didn't save the dat file (very big mistake!). Did I lose the coins? Is there any way I can get it back? What can I do? please any ideas?
I'm not familiar with those wallets, but I think it would be reasonable to assume that so long as the data is there, you should be able to access it. You could try reinstalling the wallets, and backup any files that may contain the keys, or learn more about the wallets and find out how to access your keys without opening the programs.
Always backup your keys.