Got exactly the same problem few days ago and the notification from McAfee still the same even for now.
Type: Non-removable file
Pathname: /preload/ vendor/app/ com.gamestore.apk
Created: 28 Aug 2017
The only option I got from McAfee is "Ignore threat" which I'm sceptical about.
My phone also a Lenovo phone, so after reading OP's post I expect maybe its just a false threat, maybe it's just a legit lenovo or Android's program that detected as virus by McAfee right after recent McAfee Update (Since it's created 28 Aug 2017 but just detected a few days ago) , but who knows...
So I just search and ended here to confirm if I just need to "Ignore threat" or do something else.
I will have this checked with my developing team to know more about this file. And will keep this post updated as soon as we have logs from your devicve. Can you follow the below steps to provide us the logs.
1. Open McAfee Security on device
2. Tap the top bar 10 times with-in 20 seconds.
3. Scan to start logging activity (Toaster Message) "Logging enabled"
4. Run the scan/record the issue.
5. Tap the bar 10 times to Stop the logging
6. (Toaster message) Logging stopped
And also please respnd in private message where I have asked for the the IMEI number &OS version of your device.
My husband's phone has the same "non removable file" message when he does his McAfee scan.
I'm trying to follow the steps indicated but how do I send you the logs? I'm on my computer and running the log on my his phone.