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did you tried to run antivirus and malware scan ?<br />
also did you tried to remove .lcmkfhc from file extention and open ?
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did you tried to run antivirus and malware scan ?
also did you tried to remove .lcmkfhc from file extention and open ?

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This appears to be a common question recently and points to virus that encrypts your files. Scan your comouter with up to date anyvirus software and also malwarebytes. You will most likely have to restore your files from a backup. If you dont have one you may be out of luck
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This appears to be a common question recently and points to virus that encrypts your files. Scan your comouter with up to date anyvirus software and also malwarebytes. You will most likely have to restore your files from a backup. If you dont have one you may be out of luck

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antivirus is updated , ........removed extension , copied to other pc , still cant open
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antivirus is updated , ........removed extension , copied to other pc , still cant open

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try as suggested by OriNetworks, surely system is infected. Which operating system and antivirus you are using.
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try as suggested by OriNetworks, surely system is infected. Which operating system and antivirus you are using.

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CBT locker , files encrypted , how to decrypt ?
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CBT locker , files encrypted , how to decrypt ?

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You don't, please read the links.
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most of files like .docx , .pdf , .jpeg changed to .docx.lcmkfhc , .pdf.lcmkfhc , .jpeg.lcmkfhc etc .......and file doesnt open ...showing error corrupt or cant open
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most of files like .docx , .pdf , .jpeg changed to .docx.lcmkfhc , .pdf.lcmkfhc , .jpeg.lcmkfhc etc .......and file doesnt open ...showing error corrupt or cant open

file extension

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

A vulnerability is a weakness which allows an attacker to reduce a system's information assurance. Vulnerability is the intersection of three elements: a system susceptibility or flaw, attacker access to the flaw, and attacker capability to exploit the flaw. To exploit a vulnerability, an attacker must have at least one applicable tool or technique that can connect to a system weakness, known as the attack surface. Vulnerability management is the cyclical practice of identifying, classifying, remediating, and mitigating vulnerabilities. Other vulnerabilities include security risks, security defects and constructs in programming languages that are difficult to use properly.

Vulnerabilities

Spyware is software that aims to gather information about a person or organization without their knowledge and that may send such information to another entity without the consumer's consent, or that asserts control over a computer without the consumer's knowledge; it has also come to include programs that engage in various kinds of electronic fraud. Anti-spyware is software that removes or blocks that software; some common vendors include Malwarebytes, McAfee, Spybot-Search and Destroy, Ad-Aware and BitDefender.