system
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dc,
The nt.txt file is infected. You are more than likely infected with the Hopel virus.
W97M.Hopel.A is a macro virus that infects Microsoft Word documents when you click Open, Close, Save, New, or Exit. This virus has many different payloads that it can execute on Exit.
If an infected document is double-clicked, the virus saves the infected document as C:\Windows\Command\Nt.txt.
Firstly, DO NOT SEND INFECTED FILES AS ATTACHMENTS UNLESS REQUESTED. Thank you.
Secondly, do you have Avast installed on your computer?
If so, did you run a full scan? Avast should detect the macro virus and allow you to remove it. You can also try free online virus scanners such as the one offered by Trend Micro.
The site address you provided returns to Mail Gate. The site is in a foreign language not familiar to me but the use of the word “gate” indicates some sort of mail forwarding service.
Let me know how you progress.