Mechanisms that dynamically check availability of hardware resources for applications of virtual environments are provided. One or more computing devices have various hardware resources available to applications of a virtual environment. Hardware resources may comprise, for example, amounts of memory, amounts or units of processing capability of one or more processors, and various types of peripheral devices. The mechanisms store hardware data pertaining to a specified amount of hardware recommended or required for an application to execute within the virtual environment. The mechanisms monitor for changes to the hardware configuration that may affect amount of hardware available to the virtual environment and/or application. If the changes to the hardware reduce the amount of available hardware to a point beyond the specified amount of hardware, the mechanisms prevent the application from being executed or prevent the changes to the hardware configuration.