any help?
GekkoScience Compac miner. It's inexpensive, doesn't need a lot of power, and cgminer can run on a windows machine. If you want to overclock it you will need an external powered USB hub. Check out this thread for more info:
https://bitcointalksearch.org/topic/gekkoscience-compac-bm1384-stickminer-official-support-thread-1173963
I have one of these overclocked to 325MHz and it generates ~17.9 GH/s reliably. It won't earn you but maybe 1,000-1,200 Satoshi (BTC0.00001000 - BTC0.00001200) per block, with 2-6 blocks per day depending on the luck of your pool. Mine is pointed at the kano.is pool.
If you want to actually have a chance at earning something worthwhile, the Bitmain antminer S9 is the current state of the art, but it's not cheap, and you have to be fairly quick to order one when they make them available. If you are willing to go with an older generation chip from Bitmain, consider buying an antminer S7-LN, or a used antminer S7. There is also the option of trying to pick up a use Canaan Avalon6.
Since you posted in the Bitcoin -> Mining -> Mining speculation forum, I won't suggest alt-coin mining rigs. There is a whole set of boards for that under the Alternate Cryptocurrencies section on this website.
Cheers,
- zed
edited: corrected earnings based on my account at kano.is