A project manager reports severely degraded OS performance after the installation of a recent system patch. Which of the following should the technician most likely do to correct the issue?

Reinstalling the OS is a drastic measure and should be a last resort, as it involves significant downtime and data backup/restoration, which is unnecessary when a specific patch can be reverted.

Initiating Windows System Restore can revert system files and settings to a previous state, but directly uninstalling the problematic update is a more precise and often quicker solution if the update is known to be the cause.

Uninstalling the security update directly reverses the last change that correlated with the performance degradation, allowing the system to revert to its previous, stable state and performance level. This is a primary troubleshooting step when a system issue directly follows a recent software or update installation.

Running an antivirus scan is generally for malware detection and removal; it is unlikely to resolve performance issues directly caused by a legitimate, but problematic, system patch.