Here's a way to troubleshoot whether a virus is causing the problem:
When you start your computer, press F8 before the system enters the Windows splash screen, and after the operating system multi-mode boot menu, select "safemode" with the arrow keys on your keyboard to start the computer in Safe mode.
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When startup is complete, click Start , enter Regedit.exein the Search box, press ENTER, and open Registry Editor.
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Please press [Hkey_current_usersoftwaremicrosoftwindowscurrentversionpoliciessystem] path to find the Policiessystem item to see if there are Tlntsvi.exe such a suspicious string.
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On the right side of the data bar, you may find a string similar to the following:
"Shell" = "C:windowsexplorer.exe C:windowssystem32tlntsvi.exe"
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One of the tlntsvi.exe is actually a malicious program;
When processing, simply delete the last "
c:windowssystem32tlntsvi.exe" section of the above registry key.
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