RDAgent.exe is an executable file, which belongs to a potentially unwanted program that is known as RegDefense. The primary purpose of this program is to collect the money by tricking people into purchasing its fake licensed version. It does that by showing misleading alerts that report about invented issues and then claiming that the only tool that is capable of fixing computer is its licensed version. Of course, you should never pay for it because that's how scammers generate their income.
RDAgent.exe is mostly used for launching a virus or some of its components. Once executed, the RDAgent.exe file runs a process that is responsible for parasite's payload, so there is no doubt that it is a significant part of a dangerous threat. Nevertheless, it can also work on its own, so you should remove it ASAP. For that we highly recommend such programs as Reimage that can easily help you to get rid of every malicious thing that may be hiding in your computer. Leaving such file is dangerous because it can easily try to violate your privacy and pose a serious harm your computer.
Attention! Please note that the RDAgent.exe file may also be a fully legitimate part of your operating system. That's why we highly recommend checking the file before deleting it. It can be done using RegCure Pro.