Get antivirus software. If you pay for it, it's generally better. I use a free one called AVG. It works great and got rid of all my virus's in one click. If AVG can't detect the problem, try other antivirus softwares. If it's something to do with a browser, check your extensions for anything you … Read more
If you are still need help on how to remove Trojan horse like JS/DwnLdr-MON from your computer, you can refer to this effective removal post: TrojanDownloader: JS/Ambequar.s removal instruction here.
I hope it is helpful for your computer issues.