I wanted to activate my windows 10, in the process I unistall anti virus & windows defender, that is how the virus found it way in to the system and thereby converting all my videos, documents, audios to .mosok format and they can't be play or view and even if I deleted the (.mosok) and leave (.mp3)or (.mp4) it doesn't play. Pls how can I remove this virus. Thanks in anticipation of your responds.

grudges:
I wanted to activate my windows 10, in the process I unistall anti virus & windows defender, that is how the virus found it way in to the system and thereby converting all my videos, documents, audios to .mosok format and they can't be play or view and even if I deleted the (.mosok) and leave (.mp3)or (.mp4) it doesn't play. Pls how can I remove this virus. Thanks in anticipation of your responds.

What's the correlation between activating windows and uninstalling your Antivirus? Next time if you want to do something and you are not sure how to,just ask. It will save you many mistakes.
You don't need to uninstall your Antivirus to do anything on your PC. Infact it is common sense that anything you want to install that asks you to remove your Antivirus is a virus.
You only need to turn off or disable your Antivirus to activate windows.
Get the latest antivirus or malware, install and see if it will work. You will also need a license to activate the antivirus if it's not free version.
Download Avast home edition to save yourself the headache of looking for license keys. Install and scan your system. I don't know if you will get your files back but I know it will remove the virus.

Greatzeus:

What's the correlation between activating windows and uninstalling your Antivirus? Next time if you want to do something and you are not sure how to,just ask. It will save you many mistakes.
You don't need to uninstall your Antivirus to do anything on your PC. Infact it is common sense that anything you want to install that asks you to remove your Antivirus is a virus.
You only need to turn off or disable your Antivirus to activate windows.
Get the latest antivirus or malware, install and see if it will work. You will also need a license to activate the antivirus if it's not free version.
Download Avast home edition to save yourself the headache of looking for license keys. Install and scan your system. I don't know if you will get your files back but I know it will remove the virus.

Thanks for your responds, as you said, that is how I did it, I only disable the anti virus, is a slip of tongue from my side. And I will give it a try.