What does "windowsed" mean? thanks

So in this day and age of so many online threats; malwares, ransomware, wallet stealing software, phishing, etc.

Is there a way to run something in an isolated environment where it cannot infect your actual pc or steal from hotwallet?

I saw something on virtual pc, vmware, sandboxie, and comodo sandbox, are they all the same?

One confirmation means that your transaction has been included in a block. All subsequent confirmations happen with more blocks are found on top of the block your transaction was included in. Once you have one confirmation, more confirmations will come as blocks are mined; there is nothing that you need to do.

You only need to pay a transaction fee (or fee for that service) once in order to get the first confirmation.

4 unconfirmed chained transactions, with so many ins & outs
the first one is the transaction you said need acceleration, which one of the outputs is your address?
04f385622a... 6816 (bytes)   0.05120076 BTC   751.185 sat/B
063ed02773... 11342 (bytes)   0.04837372 BTC   426.501 sat/B
7c91875870... 5752 (bytes)   0.02573971 BTC   447.491 sat/B
3e22407574... 59222 (bytes)   0.02825176 BTC   47.705 sat/B
total chained txs 83132 bytes, already paid 0.15356595 ~> (83132 * .00001) - 0.15356595 = 0.67775405
if you want to CPFP with avg 1000s/B you will need to set 0.67775405 tx fee on your CPFP tx
now you know why it asked you for $16640.88  

Why don't you just publish the transaction id and see if someone will help you out get it confirmed?

Frankly speaking until now I have used bitfinex and hitbtc both of them work on USDT model and frankly speaking I have found them to be quite good with easy deposits and withdrawals for USDT and other cryptos too. You can share if you have faced some problem so everyone else could be a bit careful in future.