Virtual box error

After this iam not able to proceed. Please hep to solve the problem.

@selvam170903 Which OS is this? Also, did you try re-installing the virtual machin?

Windows os it is. Yes I have tried

@selvam170903 In the screenshot provided. I see that you have selected Windows 7(32-bit) system. Please delete this virtual machine and then do the installation again, but this time select the Operating System as Ubuntu (64-bit).

Here is the screenshot of what you should see once the installation is correctly done: