Possible, but I regularly scan and have pro activated, but you could be right. I had to unblock a site that was in the mbam blackist a week ago, but the file, a zipped up bios, was downloaded w/o using any download manager and was for another computer, not the one I am using. I never use download managers even from well known site llike "Dell" as I dont trust any of them.

The only other antivirus is MSE which I also keep updated.

I could be wrong but I am guessing the name of the download was 1 character long or some invalid character. I did not see the selection box for "save", "cancel" and I seem to recall that the warning for mbam was right where those buttons should have been. Could an invalid filename have caused chrome to not properly display the name of the download or put it where it could not be seen? I went back to the site to see if I could duplicate the problem but it was down "try again later". I will not be going back. The site was a url linked to by the drudgereport and NOT the site I got that updated bios from.

Firefox, on 18 July 2012 - 10:06 AM, said:

Thanks for clarifying this. I have had mbam find trojans such as antivirus 2011 (or whatever year they use) and other trojans that MSE does not detect nor was able to remove. I do not use McAfee anymore as I no longer have access to the corporate updates and am using MSE, Defender and mbam pro that I bought about 6 months ago.

The company I worked for used McAfee Corporate with its policy manager and there would be one or more 30 second timeouts when booting up as both McAfee and Essentials (defender ?) were scanning the same partitions and files at the same time. McAfee forum corp support advised to disable Windows Defender to prevent this from happening and there was a walk thru on how to disable defender at their forum. Not sure if this applies here, but I thought I would mention that one option is to uninstall essentials.

I have 4 instances of chrome.exe running and I suspect one of those is that fake dialog box. I will leave it up on my monitor for a while in case it is a real MSE but I dont think it is based on the button "Clean Computer" and being asked to click "Clean PC". That does not seem right.

Why would it say "Clean PC" in the instructions. Microsoft has a lot of bean counters and they should easily spot that there is no "Clean PC" button on the dialog box. I think it is a fake attempt to download a virus.