Scans 1 and 2: Rootkit positive; Scan 3: no issues found

[Jp41]

Please be gentle, I am not computer savvy and I don't know how to create a scan log. 
But I ran a full scan today and got THREE infected files detected (although two of them seem identical?):

C:\Windows\Temp\inv7EE6_tmp\Executables\DRVUpdate.exe
  Rootkit: hidden process
C:\Windows\Temp\inv7EE6_tmp\Executables\DRVUpdate.exe
  Rootkit: hidden process
C:\Windows\Temp\inv7EE6_tmp\Executables\APPUpdate.exe
  Rootkit: hidden process

I tried to resolve them but kept getting the result: "Error: Access is denied (5)"

Frantic, I ran the full scan again.  But interestingly, I only got one infected file result instead of three:

C:\Windows\Temp\inv7EE6_tmp\Executables\DRVUpdate.exe
  Rootkit: hidden process

Again, I was unable to resolve the issue and got error (5) again.

So I said to myself, hmm, this is getting better all by itself, so I did a full scan again and came up with NO infected files detected.  Were the first two false positives? Or is there something lurking?  I am afraid to use my computer at all.  PLEASE HELP ME!!

[Jp41]

Argh, so 3 hours later i do a scan full scan again. And this time now there are two infected files reported:

C:\Windows\Temp\inv7EE6_tmp\Executables\DRVUpdate.exe
  Rootkit: hidden process
C:\Windows\Temp\inv7EE6_tmp\SCSI_ODD\SCSIUpdate.exe
  Rootkit: hidden process

And again, I get "Error: Access is denied (5)"

Please some kind soul let me know what I should do or what I should post so you can tell what is wrong.

Thanks!

[Jp41]

So I ran a full virus scan one more time, only 10 minutes after the scan that said 2 infections. And this time it said no infected files. So this is very frustrating.

[Asyn]

Attach your basic diagnostic logs. (MBAM and FRST)
Instructions: https://forum.avast.com/index.php?topic=194892

[Jp41]

Thanks Asyn. I downloaded the two programs and ran the logs. I wanted to turn off the virus software before running them but could not figure out how -- so Avast and Windows defender were both running while I ran these logs (in case that is relevant).

[Jp41]

I attached the three logs as attachments to my prior posting. So if anyone could please =review them and let me know?
Late last  night when I did a full scan again, Avast identified two infected file results and was unable to delete them. But today another scan shows not issues.  I expect that if I scan again there will be more infected files. It keeps going back and forth.  Thanks for your help!

[Jp41]

Please if some kind soul could review my logs and let me know any information. I am not using my computer and am considering doing a factory reset. Any thoughts would be appreciated.

[mchain]

A malware expert has been notified.  Please be patient.  You've done what you could, now you've to wait a bit.

[Jp41]

Thanks mchain.  I am still getting alternating Avast results of no issues and then later results with infected files and then later results with no issues. So here are a new battery of scan logs from malware bytes and frst attached . . .

[Sass Drake]

• Open Notepad (click Start button -> type notepad.exe -> press Enter)
• Copy text from code block below and paste it into Notepad

Code: [Select]

FF HKLM\SOFTWARE\Policies\Mozilla\Firefox: Restriction <==== ATTENTION
Task: {374A62B8-8736-4756-969E-4FB6922E76A8} - System32\Tasks\UninstallDDS-C960901F-CE14-4DE1-9729-1305F719A337 => C:\WINDOWS\TEMP\DeleteFolderTask.exe <==== ATTENTION


• Go to File -> Save As
• Make sure that  UTF-8 is selected as Encoding (left side of Save button)
• Save it as fixlist.txt on Desktop
• Open again FRST and click on button Fix
• Wait until FRST finishes
• fixlog.txt should be genereted and opened. Attach it your post and wait further instructions.

[Jp41]

Thanks for all your help, but I couldn't wait, and so I wiped my computer, rebooting form a USB and removed all partitions, and reinstalled Win 10. Seemed the only safe thing to do.