A user in the Human Resources $($HR$)$ department has opened an email, rendering their computer mostly unresponsive. The user has requested assistance from the IT department. A network technician has verified that there are no abnormal spikes in network bandwidth. What system resources are likely being affected on the user's computer due to the issue? $($Select all that apply.$)$

A$.$Memory Utilization

B$.$Network Latency

C$.$Packet Jitter

D$.$CPU Utilization