Virtualization Technology plays major role in the success of cloud computing. One is internet and second important one is virtualization technology. To make cloud computing model Practical and to have essential characters like rapid elasticity, resource pooling, on demand access and measured service, two prominent technologies are required. As a result, we see that such approach helps to identify preventive security countermeasures that have to be considered at the earlier stage before real attacks occur. Secondly, it applies quality-based methodology for security analyses. Hence, this paper firstly analyses malicious environment of virtualization technology. In addition to that, to better structure the risks we based Ishikawa method on traditional security model, STRIDE Model, proposed by Microsoft. In this research, we apply Ishikawa approach, method from Quality Management System in order to identify many possible causes and factors for hypervisor security risks. New approaches should be applied in order to be able to meet new security challenges of technology. System in effective way as it used to be in the past. The traditional security methods cannot be applied any more to secure However, cloud environment faces new security challenges as the architecture of virtualized environments differs dramatically from non-virtualized.

Nowadays Virtualization is an underlying technology in cloud computing that simplifies data center management improves corporate resource utilization, minimizes IT hardware costs.

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