I sent Credence Coin to my window wallet. What should I do anymore to stake it?
just leave it there and wait
Thanks but do I need to open it only until mature. Or I still need to turn on PC 24/7 to stake?
Try to do this
First put a password on your wallet to protect your coins.
Second do a backup(or 2 or 3

) of you wallet and secure them in good places, like external usb or hard disk just to be safe.
Third for staking:
Open wallet and unlock FOR STAKING ONLY.
Leave the wallet open 24 hours open, so your coins mature and get the network weight. So you start staking
Then you can close the wallet, And only open it once in a while. For example.. open once a week, like 24 hours, and collect all the staking of the week. And then close it again....
This is a method for not leaving your pc open all the time
Also on youtube there are a lot of videos, try search.
Hope it helps you
