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Thank you very much. I guess, I have to reinstall windows. Because it is also not working for discord too. It seems I cannot run .exe files.

Btw, there is also one problem not related to security. Before everything, every process you told me, I did a system restore when I found out the trojan. Because, the language of windows spotlight in the lock-screen was changed itself. The language of the words on the lock-screen wallpaper. I searched on the internet and it was the cause of last update of windows. And the solution was to do a system restore. After the system restore, I couldn't open chrome. Again, I searched on the internet and there were some problems had the same problem. The solution was to reinstall chrome. I uninstalled from apps in control panel and tried to reinstall it through chromesetup.exe. But, when I double click to run it, "On your marks" window opens with blue-color scroll and closes after 2-3 seconds itself. After a while, I tried to open discord, same thing happened. Do you have any idea how to solve it?

Fixlog.txt

Yesterday's full scan of windows defender found no threats. I will do the FRST one later ASAP.

After you told me, I looked at the protection history again and the wacatac is not there. Only nvcontainer.exe thing which is related to the Nvidia that appears there. What does it mean? Is the system clear or that was a false positive? I am asking about false positive because, I searched on the internet and there also was that it can be a false positive due the the b!ml - machine learning which leads to high probability of being false positive. But I think it is fixed now, because when it found, I told it to quarantine. And it couldn't quarantine the trojan at all. It worked with 20% of CPU for about almost 1 hour or maybe a little more than an hour and it said incomplete. After that I panicked and again clicked it just to remove it. Clicked the actions > remove instead of quarantine this time. It worked again with about 20% of CPU. Then, I again started a full scan before your warnings, because I didn't know I didn't have to start any scans, and windows defender didn't find something at all. But the trojan warning was still there. When I checked the file it shows, it was deleted from downloads. Now, how do you think? Is the system clear or that was a false positive? I am going to full scan again with windows defender to see what is going to be found. Let me know any suggestions. I am also considering to upload every personal data and important stuff to cloud, (like google, dropbox and etc.) and then format the computer and not deleting windows or also deleting windows and making everything from zero. Would you suggest that to me? Thank you very much again.

Thank you very much. Does it mean the system is clear? But why windows defender shows everytime that there is the wacatac.B!ml trojan is in the system?

I am sorry for not being patient, but it is already going to be 3 days and I can't work. Because you said not to install, do any work and etc. Can you please help me ASAP?

Fixlog.txt

I want to ask you a question. I am also considering uploading my important documents, information and stuff to cloud and then format the computer. Would you suggest me that?

can you please continue helping me?

malwarebytes one.txt

Should I do a custom scan by selecting C: drive or the normal scan?

msert.log

Okay right now, I have exited all the programs and etc. No additional scans and only the microsoft safety scanner scanning C: drive. I will send you the result when it finishes.

Thank you for your message. Before your message, I clicked remove action and the windows defender removed the file in my downloads that has the trojan. I checked the file in downloads, and it was disappeared. Then, I started full scan again. I am sorry, I didn't know that I shouldn't start any other scans. Should I continue the process you tell me? I think I have to because I have doubts.

Hi. Nowadays, I have some performance problems in games and other applications on my PC. I knew something was not right, and I started a full scan through the Windows Defender. It found the Trojan:Win32/Wacatac.B!ml Then, I selected to quarantine it. I think it failed: After some research, it seems this trojan is very difficult to remove and clear from the system. I need help, please help me.