Kicad-nightly-9.0.0.rc1 problem with

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Past similar cases?

“error 5:access denied” on Windows with Antivirus software

[SOLVED] KiCAD 6.0.4: Automatic zip backup cause "error 5:access denied" on Windows 10 with Antivirus software

I upgraded KiCAD from version 5.1.10 to version 6.0.4. When I use PCBNEW, intermittently popping up dialog message “Cannot open*/* -Backup/* - (date) .zip error: 5 access denied” was frustrating me. At first, I checked the privileges of user account, the ownership of the folders, and the security of the folders. I couldn’t find anything suspicious. I confirmed which execution file caused this error with Windows Sysinternals Process Monitor. It was kicad.exe. I turned off installed Avast Secu…

It seems necessary to check the type of antivirus software installed and the antivirus software logs.