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Strange hidden file in Windows Defender folder


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Hello, 

Today I had made an antivirus scan but ESET could not open and scan a strange file that's hidden in a path: "C:\ProgramData\Microsoft\Windows Defender". The file's name is

IMpService77BDAF73-B396-481F-9042-AD358843EC24.lock

I don't know it is safe file or I should try to remove it. I'm scared a lot, thanks for your help. 

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According to the info I've found, the file is typically 0 bytes in size so it cannot be malicious. Its name and location suggests that it might have something to do with Defender so it's rather a question for MS what is the purpose of the file.

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Hello again, 

Today I noticed that this file is being created when I turn periodic scanning by Windows Defender, because create time is exactly the same like time I changed that option in my Windows Defender's settings. When I turn it off, the file is being deleted, I'm almost sure that file helps to make periodic scanning or something like that. 

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