Strange Trojan in the system

Prompt please, who can faced it, today after some time working at the computer, the antivirus gives a warning about Troyan:



Pressed fix, the antivirus took the file to quarantine, but after a while it comes back again and again this plate. Was tested by antivirus program and Malwarebyte Anti Malware, nothing shows on the virus or miner. Tell me, what is it that the file is in the System32 folder powershell.exe" and can it be removed? Because apparently it is infected. If that system I have Windows 7. Thanks in advance to all for the help!