Malicious programs that block file access Crossword Clue

 The answer to the crossword clue "malicious programs that block file access" is RANSOMWARE.

Ransomware is a type of malware that encrypts a victim's files and demands a ransom payment in order to decrypt them. Ransomware can be spread through a variety of ways, including email attachments, malicious websites, and USB drives.

Once ransomware is installed on a victim's computer, it will encrypt all of the files on the computer, including documents, photos, videos, and music. The ransomware will then display a message demanding a ransom payment in order to decrypt the files. The ransom payment is typically demanded in cryptocurrency, such as Bitcoin.

If the ransom is not paid, the victim will lose access to their files permanently. In some cases, the ransomware may also delete the files if the ransom is not paid.

There are a number of things that can be done to prevent ransomware attacks, including:

Keeping your software up to date. Software updates often include security patches that can help to protect your computer from ransomware attacks.

Using a firewall. A firewall can help to block malicious traffic from reaching your computer.

Being careful about what emails you open and what websites you visit. Ransomware can often be spread through malicious emails and websites.

Using a reputable antivirus program. An antivirus program can help to detect and remove ransomware infections.

If you think that your computer has been infected with ransomware, it is important to not pay the ransom. Paying the ransom will not guarantee that you will get your files back, and it will only encourage the criminals to continue their activities. Instead, you should contact the authorities and seek professional help.