Answer:
The PowerShell is a kind of shell framework, which was being developed by Microsoft for covering various administrative tasks like the configuration automation and management of certain repetitive jobs. And the term 'PowerShell' does refer to both of these- and its the shell applied for executing commands, and scripting language.
And yes, you have been infected by the virus. You need to run the antivirus immediately.
Step-by-step explanation:
Please check the answer section.