Before you proceed with formatting your unbootable Microsoft Windows PC, why not try rescuing your computer with an Antivirus Rescue Disk. A rescue disk is a bootable antivirus that boots up via a flash drive and proceed to scan your Windows installation for rootkit viruses, once identified, it will clean up the system and fix the unbootable error.
There are many antivirus rescue disk in the market, there is no 1 software solution for all. Download and give at least 3 different rescue disk a go before giving up. Without further ado, here are 16 free USB antivirus for your unbootable Microsoft Windows and Unmountable Boot Volume [ Usually Hardware Issue and Not Software ].
These software works on all version of Windows XP, Vista, 7, 8 and 10. Remember to change your Bios boot sequence or else the USB bootable thumbdrive will not boot up when you restart your computer.
↓ 01 – Runtime Live CD
The Runtime Live CD is ready-to-use and preinstalled with all our data recovery tools. The Live CD is an ideal recovery environment as it is Linux-based, and therefore less prone to a Windows tendency to manipulate and change Windows-formatted disks. This reduces the risk of overwriting data that you want to recover, especially on Windows boot disks (C:). The Runtime Live CD is an alternative to our WinPE boot CD. The Live CD provides access to network resources and the Internet.
↓ 02 – REMnux
REMnux™ is a free Linux toolkit for assisting malware analysts with reverse-engineering malicious software. It strives to make it easier for forensic investigators and incident respondents to start using the variety of freely-available tools that can examine malware, yet might be difficult to locate or set up.
↓ 03 – Panda SafeDisk
Panda SafeCD is a free utility to disinfect any Operating System. Simply burn into a CD or USB and boot your PC with Panda SafeCD to scan and disinfect your PC. This useful utility comes in handy when you need to clean a friend’s PC (or your own) from a malware infested state. It is specially useful for detecting and disinfecting malware infections which give regular AV products running within Windows a hard time.
↓ 04 – Kaspersky Rescue Disk
Kaspersky Rescue Disk is a free tool for disinfecting computers from malware which does not allow the operating system to start. Kaspersky Rescue Disk is designed to scan and disinfect x86 and x64-compatible computers that have been infected. The application should be used when the infection is so severe that it is impossible to disinfect the computer using anti-virus applications or malware removal utilities (such as Kaspersky Virus Removal Tool) running under the operating system.
↓ 05 – G DATA BootMedium
The G DATA boot medium is a practical aid for detecting viruses that have already embedded themselves on your computer prior to installing the antivirus software. In the current version the boot medium is also capable of restoring all backups created with G DATA solutions (only available in the TOTAL PROTECTION solution).
The download file is an ISO file, i.e. it must either be burnt to a CD/DVD or be mounted via a virtual drive so it can be used from a USB stick for example. You can download the boot medium in the “Tools” download area.
↓ 06 – ESET SysRescue Live
ESET SysRescue Live is a malware cleaning tool that runs independent of the operating system from a CD, DVD, or a USB. It has direct access to the disk and the file system, and therefore is capable of removing the most persistent threats.
↓ 07 – Dr.Web LiveDisk
Emergency system repair from a CD/DVD disk or a bootable USB drive. If the activities of malicious programs have made it impossible for you to boot a computer running Windows, you can recover the affected system for free using Dr.Web LiveDisk!
With Dr.Web LiveDisk you can not only clean your system of infected and suspicious files but also copy important information to removable media or another computer; Dr.Web LiveDisk also attempts to cure infected objects.
↓ 08 – Comodo Rescue Disk
Comodo Rescue Disk (CRD) is a bootable disk image that allows users to run virus scans in a pre-boot environment (before Windows loads). CRD runs Comodo Cleaning Essentials on a lightweight distribution of the Linux operating system. It is a powerful virus, spyware, rootkit scanner and cleaner which works in both GUI and text mode. The tool can provide a more comprehensive and thorough scan than regular malware cleaning applications because it cleans your system before Windows is loaded.
CRD is intended to be used when malware embeds itself so deeply into your system that regular AV software cannot remove it. The rescue disk is also very effective at removing infections that are preventing Windows from booting in the first place. Apart from the virus scanner, CRD also provides tools to explore files in your hard drive, take screenshot and browse web pages.
↓ 09 – Bitdefender Rescue CD
Bitdefender Rescue CD is a free tool that scans and cleans your computer whenever you suspect a malware threat is affecting its operation. Bitdefender Rescue CD works without loading the operating system and can be set up either on a CD/DVD or on a USB flash drive.
↓ 10 – Download Avira Rescue System
The Avira Rescue System scans and repairs malware-infected computers that no longer boot or are generally unresponsive. Running on both Windows and Linux operating systems, our integrated scan and repair Wizard is highly intuitive and easy to use. Are you concerned about recovering data from your system? If so, the Avira Rescue System is the ideal tool for you.
And if for some reason you need outside assistance, the Rescue System can establish a remote desktop connection with Avira Support. The Avira Rescue System is updated daily so that the most recent security updates are always available. To use the Rescue System burn it to a CD or copy it to a bootable USB stick and then boot your system from that CD or USB stick.
↓ 11 – AVG Rescue CD
Keep your systems running smoothly with protection from AVG Rescue CD. This comprehensive toolkit repairs system crashes and returns systems to operating at full capacity. Complete recovery. Completely free. Icon for AVG Rescue CD Business Edition. Complete recovery. Completely free.
If malware gets past your security software, AVG Rescue CD can get your PC back up and running. AVG resellers have been using this same solution to recover their customers infected systems and now it’s available to your business, free of charge. It’s your systems clean bill of health without the bill.
↓ 12 – AOSS Malware Scanner [ Discontinued ]
Once a system is infected with malware it becomes difficult to remove that malware as it is already embedded in the system and has control over many components which are key to the system’s operations. Malware, like rootkits, use system components to hide themselves and prevent other software from detecting or removing them.
This is often the case of who gets there first; if the malware is able to get control of the system earlier on then it also has control over any software that may be run later. Besides just hiding, malware can also block the execution of other security applications. If you cannot install or run a security application in the first place then you cannot scan and detect the malware.
The best time to remove this malware is when it is not running, but malware often starts with the Operating System, so we would have to stop the Operating System to stop the malware. On a shutdown OS nothing is running and malware like rootkits cannot hide themselves and so it would be easy to find and remove them.
↓ 13 – Antivirus Live CD
Antivirus Live CD is a 4MLinux fork including the ClamAV scanner. It’s designed for users who need a lightweight live CD, which will help them to protect their computers against viruses. Both Ethernet (including Wi-Fi) and dial-up (including fast USB modems) Internet connections are supported to enable automatic updates of the virus signature database. All partitions are mounted automatically during boot so that they can be scanned by ClamAV.
If you are unable to remove threats using the regular scanner in your Norton product or if your computer will not start, use the Norton Bootable Recovery Tool to get the problem resolved fast. For instructions on how to use Norton Bootable Recovery Tool, click here. Gets your computer back up and running if it becomes so infected that it won’t work properly or even start.
↓ 15 – Trinity Rescue Kit [ Discontinued ]
Trinity Rescue Kit or TRK is a free live Linux distribution that aims specifically at recovery and repair operations on Windows machines, but is equally usable for Linux recovery issues. Since version 3.4 it has an easy to use scrollable text menu that allows anyone who masters a keyboard and some English to perform maintenance and repair on a computer, ranging from password resetting over disk cleanup to virus scanning
↓ 16 – F-Secure Rescue CD [ Discontinued ]
F-Secure Rescue CD contains the Knoppix derivative of the Linux operating system, which can run completely from a CD and allows access to your PC’s operating system and hard disks.
Use Rescue CD to boot up a PC you suspect has been infected, or has had its security software compromised. Note that it cannot scan encrypted disks. Once booted, you can check the installed programs and perform more advanced repair and data recovery operations.