Generally speaking, running the same copy of Windows from a Virtual Machine on more then one system is no different then from a Physical Machine as far as the EULA and WPA/WAT is concerned and as such what you're doing in all likelihood violates the EULA. The reason I said "generally speaking" is because you didn't say what version of Windows or the type of License you have.
Anyway the answer to your question is depending on the version technically yes, however because implementing the necessary workaround could in all likelihood violate the EULA it may not be discussed here.