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Troubleshooting Security Issues Part 2 Other security issues that may develop involve files. There may be new or renamed files noticed on the system, or there may be system files that are noticeably missing, this is the work of Malware. There may be files or folders that can no longer be accessed directly, or whose permissions have changed or have new owner, or directories that you can no longer take ownership of, this is also Malware. So we discuss how Malware can move around making changing the dynamics of files and folders in an attempt to preventing corrective actions and we discuss a number of tools such as antivirus software and Windows resources such as the Recovery Console and System Restore that can be used to correct his.