There is no need to think too much about the inability to copy files on the computer. Many people must have encountered a situation where one file on their computer cannot be copied. Some of them are prompts that they are in use, and some are prompts that the permissions are insufficient, what should I do at this time? Www.2cto.com let WinHex help you solve it. For example, if your computer is win7 and you go to c: \ windows \ system32 \ config to copy the file SAM, the system will certainly prompt that the current file is in use and cannot be copied. In this case, you use WinHex to open the current directory (provided that you have installed the WinHex software), click the tool, select Open disk, or use the F9 shortcut key. Then, go to the config folder, and you will see the file SAM. Right-click SAM and you will see a copy option. Then, click the target disk option, select the destination to be copied.