______1.OS installation method where system configuration settings, applications and data are preserved.  ____________2. Provide a substitute for a real machine.  ____________3. Virtual Machine which is codenamed Viridian.    _____________4. OS installation method where it deletes all data on the partition where the OS is installed and requires application software to be reinstalled.  _____________5. It is designed to execute computer programs in a platform-independent environment.  ______________6. It was one of the first commercially successful companies to virtualize the x86 architecture. 

correct answer = brainlist
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