Since you have Norton A/V in the system you could use the Norton power eraser, which should be downloadable from their website. If you Google Trojan. Maljava you should be able to locate a fix for the issue, using Norton. Another thing you could try would be to download Malwarebytes, boot the system into Safe Mode with Networking, run a MWB scan. At the end of the scan, click on SHOW RESULTS, if the bug appears, if present it should appear tagged in red, click remove. Typically, this would be done in Safe Mode with Networking, the Norton power eraser would be run in the same mode.