Fake MSE "clean computer" window

I've had this thing before, but I can't remember how to rid myself of it. I got it while I was on an ESPN page. I ran a Malware Bytes Pro scan which detected PUP malware. I deleted that and thought I was really smart. Restarted the computer, stupidly went back to the ESPN page, and the thing was still there. It's actually two windows: The original fake Microsoft-looking window and the one behind it, the Big Red "X" showing three standard scary-looking malware programs. with which I am supposedly infected. There is no way to get rid of it conventionally, and the scan didn't do it. I can still use the computer, but I know the thing is lurking.

Please tell me this is something simple to fix...

Is it a simple popup or did something install again?

Run another Malwarebytes scan to see.

Do you have Java installed?

Uninstall Java and see if you miss it.

What antivirus app are you using?

Anti-virus is just what's with MSE. I've tried AVAST & it was really annoying.

I'll uninstall Java now. Just curious: What's the connection between JAVA & fake MSE window?

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When I try to uninstall Java (update 51), the fake MSE window appears & aborts the uninstall.

Java has been used to infect computers. If you need Java, then it might be worth the risk of having it installed. If you do not need Java, then you are taking a risk for no gain.

Try to uninstall Java again and take/post a screenshot of this fake MSE window via Alt+Prnt Scrn
Screenshots and Files - Upload and Post in Seven Forums
Alt+Prnt Scrn should capture just the window that has focus and not the whole desktop.

You might want to glance at this post about using MS Paint.

After you have posted the screenshot...
...boot to the safe mode
...try to uninstall Java again while in the safe mode.

I finally got Java uninstalled late last night and then ran a full scan of Malwarebytes Pro. Since it took so long, I went to bed. This morning, the report indicated no malicious items. Under "Programs" in the control panel Java is gone. I still have the fake MSE windows. What should I try now?

Hi, fellow South Texan. Thanks for the advice. I ran the Adwcleaner, and it didn't capture any bad guys. But for some reason, the MSE fake window has disappeared. I haven't had any positive scan results, and I still had the window after I uninstalled Java. So I have no idea what miracle has transpired, but I am grateful. Hopefully, I won't have to bother anyone again -- at least with this particular issue.