Hello, Heroes of Bermesiah! - will be updated [b]■ How to check current operating system [url=https://support.microsoft.com/en-us/windows/which-version-of-windows-operating-system-am-i-running-628bec99-476a-2c13-5296-9dd081cdd808][Link][/url][/b] - If the PC already has a 64-bit Operating System, an upgrade is not needed to play. [b]■ How to upgrade to 64-bit Operating System[/b] - First, check the 64-bit support for the current CPU. - [Windows 10]: Settings > System > About > System Type - [Windows 8/8.1]: Settings > PC Info > System Type - [Windows 7]: Start Menu > Right-click Computer > Properties > System Type - In System Type, if the CPU includes "64-bit processor" or "x64", the CPU supports 64-bit. 64-bit client can be used to play after updating to 64-bit Windows. [url=https://www.microsoft.com/en-us/software-download/windows10][64-Bit Windows Update Link][/url] - In System Type, if the CPU includes "32-bit processor" or "x86", the CPU does not support 64-bit. 64-bit client can be used to play after changing the CPU for one that supports 64-bit Operating Systems and updating to 64-bit Windows. [b]※ Additional Details[/b] - will be updated We will strive to create the best experience possible. Thank you.