A user's workstation is experiencing intermittent shutdowns. After gathering information and questioning the user, you suspect an overheating issue. Upon opening the case, you confirm that excessive dust build-up is causing the CPU heat sink to fail in dissipating heat properly. What is the next best step to resolve this issue?
Clean the dust from the heat sink and any other internal components affected.
Replace the CPU as it is likely damaged due to overheating.
Update the BIOS.
Apply a new layer of thermal paste to the CPU.