B: Explain the effect of these activities on the performance of the computer system; indicate why they are undertaken and what benefits they bring to the system.

Installing a firewall on computer affects beneficially on the system such as your computer increase the security that you’re PC and contents are being protected. This activity has been taken to monitor incoming and outgoing security alerts and the firewall company will record and track down an intrusion attempt depending on the severity.
Anti-virus software is a computer program designed to detect and respond to malicious software, such as viruses and worms but some time anti-virus software does not recognize the latest virus program. So, to secure the computer anti-virus needs to update. New viruses are developed everyday so in order to detect the latest malicious programs every Anti-virus Software needs to update to secure computer from new viruses. You can also organize full system schedule, which automatically updates and scans your system by your software at particular day and time which you scheduled.

Patches is a type of software which provides better security information to help users by protecting users against viruses and worms. Firewall is utility software which protects computer and users against hackers and authorized users. Defragmenter is a process which improves hard drive performances, it deletes all temporary files, junks files, dump files etc. therefore, when you run defragmenter it reduce the unnecessary data and allows storage to used more efficiently. Drive formatting makes computer system work faster than before.