Bitmonerod.log says " IGD port mapping. No IGD was found."
 What does it mean? 

Newb, reporting in. What is the blockchain.info equivalent for XMR? I need to verify a transaction.

Would you pay all pool payout fees? I'm loosing more than 10% of my income processing payouts with 0.1 tx fee every hour.
I already said that 0.1 is ridiculous, then said it's a joke, because I realised that you have no clue how it works at all and probably it's a waste of time to start explanations.
Me and another people should not suffer losses because you have no enough money to keep price at desired level.

It does you no good to run a Monero pool if the blockchain becomes too large and the coin becomes impractical to use at all.

If (some of) your payout transactions are <20k then you will likely benefit from per-kb fees.

Also I know some of the pools have switched to 3 hour payments. You might consider something like that.

Ultimately the market will have to find the right equilibrium between speed of pool payments and cost.

BTW, you aren't doing your users any service by making very small payouts to them. It makes their transactions much larger when they try to spend.

Obviously, this high fee proposal related to manipulations, not to blockchain size. It's just insane that someone saying that 0.7% of block reward for transaction is no enough. Let's see how it will be accepted. Tx-size based fees would be cool, I was never against.

Why have Bitmonerod show - No IGD was found?   

That's fine, just means it cant find UPnP in order to open ports automatically, you can ignore it.

It does seem to be a filesystem error, when you started using the new --data-dir setting bitmonerod will create new p2pstate.bin and poolstate.bin files once it has found some peers and received some txes from them, seems like that is where yours is getting stuck. Has to be a low level freeze if "End process" in Task Manager doesnt work, must admit I'm suspicious that KIS has decided it doesnt like monero any more - for it to be a general hardware/system error I'd be expecting you to have a lot more serious problems with Windows.

Maybe its worth trying out VirtualBox and creating an Ubuntu virtual machine in that to run your bitmonerod on? Its not as hard as it might sound, and it could potentially be more secure

not positive, but may have a look at the create times on the p2pstate.bin and poolstate.bin's in C:\Users\Admin\AppData\Roaming\BitMonero\ , as that is where they live in most cases i have run into. (edit - i'm not sure what the --data-dir override does exactly, but i've never seen those p2pstate.bin or poolstate.bin reside in the exe's directory before)...

That your Antivir/Firewall or whatever is blocking....