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Remove Boot.Cidex Virus, Help to Repair Boot Sector Virus

Boot.Cidex is a type of Boot Sector virus, which is regularly propagated by mobile HDD (mobile hard disk drive) /removable devices such as USB memory stick or floppy disk. By default, Boot Sector serves as a gathering place to store hard disk, floppy disk, optical disc or other data storage device for the sake of controlling the operating system’s boot loader. Master boot sector comes out as the first sector of hard disk which has is responsible for split control table and coding of the operating system. Those surplus 16 or more system sectors apart from Master boot sector are commonly unused. Hard disk drive can be maximally divided into four storage partitions and extended partition of disk operating system can be subdivided into multiple logical drives.

Diskette does not contain Master boot sector, the formatted diskette in accordance with standard format disk operating system is the similar as the disk operating system of hard disk partition in structure. When one malign floppy disk is inserted into a victim’s computer, the Boot.Cidex virus then technically infects the computer’s DOS boot sector or Master Boot Record (MBR) through surreptitiously embedding its codes and commands into kernel system. Once the affected floppy boot sector is loaded up, the Boot.Cidex virus will be activated on compromised machine forcibly. To be specific, during the process of starting up computer, BIOS (Basic Input and Output System) will execute the virus code stored in floppy boot sector area, which directly allows Boot.Cidex virus to get command of affected system.

Afterwards, the Boot.Cidex virus will implant negative codes into hard disk master boot sector to start the further damage. It seems that the affected computer may run normally from a computer user’s point of view. Nonetheless, Boot.Cidex virus can be destructive for computer users according to its auto launch whenever Windows boots up. Without timely eradication, the Boot.Cidex virus could be spread onto internal storage and may infect frequent-used diskette or other readable disks without host’s awareness. The symptoms related to Boot.Cidex virus may include Booting and starting up problems, retrieve data problems, slow performance of computer issue, etc. What’s worse, the Boot.Cidex virus could even exploit more system vulnerabilities so that to drop and install additional malware to do further harm on computer. Ultimately, victims may encounter the problems of computer freeze, a blue screen of death and even computer crash.

Note: The following instruction requires certain expert skills during the manual removal procedure to avoid wrong operation which may damage your computer permanently. If you cannot remove Boot.Cidex virus completely by yourself, you may contact VilmaTech 24/7 Online Computer Experts here to help you quickly and safely remove all possible infections from your computer.

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How to Repair Boot.Cidex Virus

The Boot.Cidex turns up as a detrimental Boot Sector infection for computer users. Similar as its related member Boot.Cidox virus (Click here to read more), Boot.Cidex threat has the capability to corrupt default system configuration so that to protect its malign operation. Supposed that the Boot.Cidex virus cannot be removed from affected computer successfully, it may make unexpected hazards on machine including slow performance of system, Blue Screen and computer crash. In some cases, computer users may detect the infection of Boot.Cidex with the aid of their trusted anti-malware applications like Avast, Norton, Microsoft Security Essentials. However, the tricky Boot.Cidex malware is capable of restricting the removal processes by anti-malware applications. In this case, you may consider the helpful manual removal which refers to the operation of erasing all its related processes, dll.files and registry files so that to completely remove Boot.Cidex virus for good. If you are not familiar with computer operation and afraid of making mistake, you may ask help from VilmaTech Online Agents to resolve your problem completely.

Manually Remove Boot.Cidex Virus Step by Step

Attention: To avoid unwanted data loss or worse results, it is suggested that you back up Windows registry first before carrying out the approach.

Method one: Restore Master Boot Record

Here uses Windows XP as example:

1.    Prepare a Windows XP CD-ROM and then insert it into CD-ROM drive.

2.    Restart affected computer from CD-ROM drive.

3.    When the “Welcome to Setup” screen appears, please press R to start Recovery Console.

4.    Select the which Windows installation would you like to log onto from the Recovery Console, and type the administrator password and press Enter.

5.    Type fixmbr command and press Enter, and then to restore the Master Boot Record
6.    Type exit and enter. The computer will restart now.


Tips: If you have any problem or question during the whole removal process, please contact VilmaTech Support agents 24/7 online for more detailed instructions.

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Method two: Remove Registry Files of Boot.Cidex Virus

1. Press CTRL+ALT+DEL or CTRL+SHIFT+ESC or Press the Start button->click on the Run option->Type in taskmgr and press OK. It will bring up the Task Manager Window, end all the malicious processes created by Boot.Cidex virus, and Enter.


2. Show Hidden files of Boot.Cidex Virus

  • Click the Start button> Control Panel> Appearance and Personalization, and then clicking Folder Options. When you open Folder Options windows, click the View tab.

file folders 2

  • And then under Advanced settings, click Show hidden files and folders, uncheck Hide protected operating system files (Recommended) and then click OK.


3. Remove the associated files stored in folders on Local Disk (note: new files are still created each month so far):



4. Open Registry Editor and find out the following Boot.Cidex registry entries and delete: (Windows 7, Windows Vista & Windows 8, go to Start menu, Search, type in “Regedit)


HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Temp


The Boot.Cidex virus belongs to the category of Boot Sector virus, which is endowed with advanced techniques by cyber criminals to make damage on affected computer. Different from other common-type malware, the Boot.Cidex virus has the ability to bypass the detection and auto removal from anti-malware applications. Though users may update their antivirus software to the latest version which is equipped with newest virus data base, it may still have a failure to deal with Boot.Cidex virus alone. If this is the case, you may consider the helpful manual removal to permanently terminate Boot.Cidex virus for good. Anyhow, manual removal is a process of high complexity and should be performed with extreme caution, or mal-operation often results in loss of precious data even system crash. If you are not familiar with manual approach and fear to make worse results for computer, it is recommended to contact VilmaTech online experts for tech support , who have sophisticated experience handling all kinds of computer problems.

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