Thanks for the reply could you elaborate? So I have to start from the beginning?
Say It take 2 hours to achieve a block but I mine for 1 hour and then shutdown my computer do I have to wait another 2 hours to mine a block again or only an hour?
I would have to wait another 2 hours?
Hairy, the smallest quantized unit of work is a share. You submit a few to hundreds every minute. If you shut down at any time you only lose a very small amount of work - almost unmeasureable unless you start/stop your miner every 20 seconds or something stupid like that.
No single person starting off is aiming for blocks (only solo miners who have massive farms and you would know if you were one).
Just keep doing what you're doing and mine when you can.