setup your devices such as keyboard or mouse to bring it out of standby.
Go to Control Panel > System > Hardware > Device Manager
Look for your mouse and keyboard in the list, go to properties then Power Management and you should be able to check "Allow this device to bring the computer out of standby".
To stop it going into standby, go to Power Options in Control Panel. On the Power Schemes tab, you can set it to not go into standby.