Windows 10: No virus or trojan on my PC aftera full scan, but

Hi,


Here is my problem:



I am running Windows 10.


I create a .exe program with Visual Studio 2019 and after scanning this file with Defender it says "No current threats".


So far, so good.


As soon as I upload this file to my ONEDRIVE or sync my local files to ONEDRIVE the problems start.


If I try to download the file through the browserChrome or Edge it says it is infected with a trojan.


Then Defender treats all copies of this file on my PC as infected.


Why does it first say no threats, but as soon as try to download it says infected?

:)

 

Trojan virus

Suggestion to read:
Suggestions for asking a question on help forums

Without knowing any details....:

See the helpful links posted by

quietman7 - MVP

here

Copy/paste of above post:

Malware Removal Guides for Windows

• How to Remove Adware from a PC
• How to find and clean malware infections with Emsisoft Emergency Kit
• How to use Emsisoft Anti-Malware to scan and clean malware from your computer
• How to use Malwarebytes Anti-Malware to scan and clean malware from your computer
• How to Remove Toolbars and Adware with AdwCleaner
• How to use Junkware Removal Tool by Malwarebytes
• How to Find and Remove Malware with Windows Defender Offline
• How to use SUPERAntiSpyware to scan and remove malware from your computer
• How to remove a Trojan, Virus, Worm, or other Malware
• Best Free Trojan Horse Scanning And Removal Software
• How to easily clean an infected computer (Malware Removal Guide)

You can always supplement your anti-virus or get a second opinion by performing an

Online Virus Scan...

ESET is one of the more effective online scanners.

Stubborn Malware Removal Guides for Windows

• How to Use An Antivirus Boot Disc or USB Drive to Ensure Your Computer is
  Clean
• How to create rescue discs to fix an infected computer
• Everything You Need to Know About Linux Live CDs
  
• How to Fix a Windows Infection Using Linux
• How to Scan and Repair an Infected Computer From Outside Windows
• How to remove stubborn malware with Kaspersky Rescue Disk
• 17 Bootable Antivirus for "Your Computer has been locked!" Ransomware

==========================================================

 

removing Trojan virus

The windows defender has detected the same virus on 4 separate scans but is unable to remove it. The app doesnt even log the scan I did or the detected virus.

How can I remove this? It is a Trojan type virus that is attached to one of the gaming programs that came with the PC.

 

PC Infected by Trojan Virus Rootkit.Fileless.MTGen

PC Infected by Trojan Virus Rootkit.Fileless.MTGen

Symptoms:-

1. With the default browser set to Internet Explorer Internet Shortcuts would start and then close down almost immediately. Changing the default browser to Microsoft Edge worked OK.

2. The Microphone did not work as the virus kept Muting the Microphone and setting the level to zero.

Manually resetting these would only last a few seconds before they were reset again.

A full scan by Microsoft Windows Defender or McAfee BT Virus Protect did not detect the virus but using the trial version of Malewarebytes succeeded in finding and then quarantining the Trojan Virus.