One of the problems we may encounter is an unbootable PC.
In this situation, a bootable rescue disc comes in handy.
In this article, we will discuss the security rescue discs provided by the antivirus companies.

These bootable rescue discs can clean your system from viruses, even if your system cant start.
The Rescue CD can also update itself automatically, but it will require an Internet connection for updating.
This gives a power user an additional advantage of troubleshooting an unbootable system, apart from scanning for viruses.

It will even scan inside your archives to remove any threats from an unbootable system.
You cannot download it separately.
It can boot into the system and find viruses and other malware.

Once booted, you might check the installed programs and perform more advanced repair and data recovery operations.
Operating System: Linux command line
Download Panda Cloud Cleaner Rescue ISO
Dr.
Web LiveDisk for burning to CD/DVD
Download Dr. You will need additional steps such as signing up for a Sophos account to get the bootable image.

If the system remains unbootable even after scanning, you may backup your important data.
There are two versions of Windows Defender Offline for 32-bit and 64-bit systems.
It supports heuristics scanning, options to skip large files for quick scanning, and can scan archives.

It has direct access to the disk and file system, and therefore can remove the most persistent threats.
You will need a third party app to burn the ISO image to the CD-ROM.
Here is the step by step information for doing this easily.

There are quite a few tools that can create bootable USB drives from ISO images.
I will use Stickifier here, as it is free and open source.
I hope it’s possible for you to choose from one of the live CDs to troubleshoot your system.

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source: www.itechtics.com