The fearful fame of the Trojan Horse viruses is largely attributed to their potential to inflict multiple forms of damage as soon as they get into the targeted machine. This means that you can expect serious system damage, PC Registry corruption, corruption or deletion of different important files from the HDD, as well as secret insertion of ransomware, rootkits and other nasty threats. New infections such as Trojan.Hesv.jme may also be set to spy on your activities, and even provide its criminal creators with remote control over the hacked computer. So, if you have even the slightest doubt that a Trojan like this one might be hiding somewhere in your OS, it is really your best (and only option) to detect and remove it ASAP.  Trojans such as Trojan.Hesv.jme, Multi Speed Up and Wd Cloud.exe can be quite stealthy and wouldn't really show any symptoms of their presence in order to avoid being detected for as long as possible. In most cases, there will be nothing odd that could serve as a red flag. Still, sometimes, the victims may detect a spike in RAM and Processor usage, as well as occasional errors or repeated failures of the system and some of the software installed on it. The way of distribution of such Trojans is also very stealthy. A malware like Trojan.Hesv.jme may be introduced to the system in an unexpected way. Most commonly, this could be an email notification or a spam message or file, a (fake) request for upgrade or a simple pop-up. Thus, your best chance to avoid these threats is to have a reliable antivirus program in place and avoid interaction with sketchy web materials.