If it is only showing in your downloads folder that does not necessarily mean it has been installed...you may only be looking at the file. If that's the case you should be able to remove it.
If you have Malwarebytes Anti-Malware installed, you can use its built-in FileAssassin
feature for removing stubborn malware files.
- Open Malwarebytes, go to the "More Tools" tab and click on "FileASSASSIN" to download and save it to your desktop.
- Double-click on fileassassin-setup to install and run the tool.
- Drag the file to be removed into the text area or click the (...) button and browse to its location.
- When you find the file, click on it to highlight, then select Open.
- Leave the default "Attempt FileASSASSIN's method of file processing".
- Put a check mark next to Delete file and click Execute to begin the removal process.
- If removal did not require a reboot, you will receive a message indicating the file was deleted successfully.
- Click Ok, exit FileASSASSIN and reboot your computer anyway.
- If the file did not remove, start the program again...locate the file the same way as before but this time put a check next to "Use delete on Windows reboot functions" and click Execute.
-- Note: If the detected file keeps returning after repeated removal attempts, then you probably have other malware on your system which is protecting or regenerating it.
Caution: Be careful what you delete. FileAssassin is a powerful program, designed to remove highly persistent files. Using it incorrectly could lead to serious problems with your operating system if removing a critical file.
If you don't have Malwarebytes installed you can download the portable version of FileASSASSIN