BleepingComputer.com: Defender Error:

Anything I can do? It cannot remove Win32/Virtunmonde.O. Think I may have other malware as well.

Thanks!

Error encountered:
Code 0x80508017. Some actions couldn't be applied to potentially harmful items. The items might be stored in a read-only location. Delete the files or folders that contains the items or, for information on removing read-only permissions from files and folders, see Help and Support.

Category:
Trojan

Description:
This program displays advertisements and may be difficult to remove.

Advice:
Remove this software immediately.

Resources:
process:
pid:2412

regkey:
HKCU@S-1-5-21-3624626081-327123316-148754407-1001\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\\SystemOptimizer

runkey:
HKCU@S-1-5-21-3624626081-327123316-148754407-1001\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\\SystemOptimizer

file:
C:\Users\Liz\AppData\Local\Temp\skkwunwk.dll

View more information about this item online

Now that you have an open HJT log posted in the HijackThis Logs and Analysis forum, you shouldn't make any changes to your system.
Doing so, could change the results of the posted log, making it difficult to properly clean your system.

BTW, if you make another post to your Hijack log, the team member, when glancing over the replies, might assume someone is already helping you out, and will not respond.

Your hijackthis log is posted here.

Please refrain from asking for help from other members or staff while you are being instructed by a member of the HJT Team. As already noted by TMacK, any modifications you make can result in system changes which may not show it the log you already posted. Further, following advice outside of that post may cause confusion for the team member assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.

To avoid confusing, I am closing this topic until you are cleared by the HJT Team. If you still need assistance after your log has been reviewed and you have been cleared, please PM me or another moderator and we will re-open this topic.

Thanks for your cooperation.