Hello,
sorry for my bad English but I live in another continent ;-)
I invested in ATBCoin, but until now didn't transfer them into the wallet. Before I do, I have 2 questions:
- Can I install the wallet on f.e. 2 PCs (work and private) and manage my coins on both computers? Do I only need the private key?
- Mining sounds very easy, because in contrast to Bitcoin mining I don't need expensive hardware, only an internet connection. But the PC must be switched on the whole time...Am I right?
Thanks for your help!

You can find the answer about transfering
HEREDetailed instructions on how to download / delete your wallet are available in this
section.
there is a number of opportunities increasing the amount and chance of new coins being mined, I will list them below:
1. The volume of the stake held on the balance (the more is your share - the greater is the chance of getting mining)
2. The total amount of shares kept in all wallets of all network members (The smaller is the proportion of other network participants - the greater are the chances of getting mining)
3. Complexity at the current stage of mining. With increasing complexity, the volume of mined coins will be reduced. It will happen once in two years. Profitability is reduced by 50%
4. The period of the wallet being online. The more time your wallet is on the network, the greater are the chances of obtaining mining, because only wallets (nodes) supporting the network can participate in the mining (ones that take the information and synchronize with the single distributed registry - the blockchain).