Checking for application updates is the first troubleshooting step that the user should perform, because the application may not be compatible with the new OS version and may need an update to fix the issue. Deleting the application's cache, rolling back the OS update, or uninstalling and reinstalling the application are possible solutions, but they are more time-consuming and disruptive than checking for updates. Reference: : https://www.comptia.org/training/resources/exam-objectives/comptia-a-core-2-exam-objectives : https://www.lifewire.com/how-to-update-apps-on-android-4173855

The technician should quarantine the system first1
Reference:
CompTIA A+ Certification Exam: Core 2 Objectives Version 4.0. Retrieved from https://partners.comptia.org/docs/default-source/resources/comptia-a-220-1102-exam-objectives-(3-0)

EFS (Encrypting File System) is a feature that allows a user to encrypt a single folder or file on a Windows PC. It uses a public key encryption system to protect the data from unauthorized access. FAT32 and exFAT are file system formats that do not support encryption. BitLocker is a feature that encrypts the entire drive, not a single folder or file. Verified Reference: https://www.comptia.org/blog/what-is-efs https://www.comptia.org/certifications/a

https://www.educba.com/shell-scripting-in-linux/

Ransomware is a type of malware that encrypts the files on the victim's computer and demands a ransom for their decryption. Ransomware can cause high disk throughput by encrypting large amounts of data in a short time.