Recovery mode is a special boot option that allows the user to access advanced tools and features to troubleshoot and remove malware from the device. Recovery mode can also restore the system to a previous state or reset the device to factory settings. Running System Restore, scheduling a scan, or restarting the PC may not be effective in removing the malware, as it may still be active or hidden in the system files.

Booting into safe mode and performing a malware scan are the steps that a technician should perform when troubleshooting an issue with pop-up advertising messages on a PC. Safe mode is a diagnostic mode that starts the PC with minimal drivers and services, which can prevent the pop-up malware from running. Malware scan is a tool that can detect and remove the pop-up malware, as well as prevent further infection or damage.
Investigating how the malware was installed, reinstalling the browser and restarting the machine are possible steps that can be done after booting into safe mode and performing a malware scan, depending on the situation and the results of the scan. Verified References:
https://www.comptia.org/blog/how-to-boot-into-safe-modehttps://www.comptia.org/certifications/a

NTFS stands for New Technology File System and it is the preferred filesystem for Microsoft Windows OS since Windows NT 3.1 in 19931. NTFS replaced FAT (File Allocation Table) as the default filesystem for Windows because it offers many advantages over FAT, such as:
* Support for larger volumes and files (up to 16 exabytes)2
* Support for file compression, encryption, and permissions2
* Support for journaling, which records changes to the filesystem and helps recover from errors2
* Support for hard links, symbolic links, and mount points2
* Support for long filenames and Unicode characters2
FAT32 is an improved version of FAT that supports larger volumes and files (up to 32 GB and 4 GB respectively) and is compatible with older versions of Windows and other operating systems3. However, FAT32 still has many limitations and drawbacks compared to NTFS, such as:
* No support for file compression, encryption, and permissions3
* No support for journaling, which makes it vulnerable to corruption and data loss3
* No support for hard links, symbolic links, and mount points3
* No support for long filenames and Unicode characters3
APFS (Apple File System) is the default filesystem for macOS, iOS, iPadOS, watchOS, and tvOS since 20174.
APFS replaced HFS+ (Hierarchical File System Plus) as the preferred filesystem for Apple devices because it offers many advantages over HFS+, such as:
* Support for larger volumes and files (up to 8 zettabytes)4
* Support for file cloning, snapshots, and encryption4
* Support for space sharing, which allows multiple volumes to share the same storage pool4
* Support for fast directory sizing, which improves performance and efficiency4 ext4 (Fourth Extended Filesystem) is the default filesystem for most Linux distributions since 20085. ext4 replaced ext3 as the preferred filesystem for Linux because it offers many advantages over ext3, such as:
* Support for larger volumes and files (up to 1 exabyte and 16 terabytes respectively)5
* Support for extents, which reduce fragmentation and improve performance5
* Support for journal checksumming, which improves reliability and reduces recovery time5
* Support for delayed allocation, which improves efficiency and reduces metadata overhead5 References:
1: NTFS - Wikipedia 2: [NTFS vs FAT32 vs exFAT: What's the Difference?] 3: [FAT32 - Wikipedia] 4:
[Apple File System - Wikipedia] 5: [ext4 - Wikipedia] : NTFS vs FAT32 vs exFAT: What's the Difference? :
FAT32 - Wikipedia : Apple File System - Wikipedia : ext4 - Wikipedia

MSRA stands for Microsoft Remote Assistance, and it is a feature that allows a technician to remotely view and control another user's Windows PC with their permission. MSRA is built-in to Windows and does not require any additional software installation. To use MSRA, the technician and the user need to follow these steps:
On the user's PC, type msra in the search box on the taskbar and select Invite someone to connect to your PC and help you, or offer to help someone else.
Select Save this invitation as a file and choose a location to save the file. This file contains a password that the technician will need to connect to the user's PC.
Send the file and the password to the technician via email or another secure method.
On the technician's PC, type msra in the search box on the taskbar and select Help someone who has invited you.
Select Use an invitation file and browse to the location where the file from the user is saved. Enter the password when prompted.
The user will see a message asking if they want to allow the technician to connect to their PC. The user should select Yes.
The technician will see the user's desktop and can request control of their PC by clicking Request control on the top bar. The user should allow this request by clicking Yes.
The technician can now view and control the user's PC and assist them with installing software.