Joann turned on her Windows 10 computer today, and while the computer was booting up, it shut down. She restarted the computer and it booted fine but ran slowly. She opened Task Manager and noticed that her CPU was running at 98% capacity and her network at 75% capacity. When she checked to see what process was using so much network connectivity, she received a message saying that access to the process was denied. Based on these indicators, what should Joann do with her computer? (Select all that apply.) a. Run antivirus software. b. Refresh Windows. c. Disconnect from the network. d. Roll back to a previous restore point. e. Check the file permissions