File extension


Tag File Type

The extension is almost a portion of each file. If a file has no extension, then the operating system cannot process this file, and the method of processing the file cannot be discriminated.

Protecting Important Files

For some files (such as DOC, etc.), we don't want others to open freely. The simplest protection method is to modify its extension to another name, such as ".xls" extension modified to ".cqq", etc., when double-click ".cqq" file, you can't open it directly, let Others mistakenly think this is an unknown file, and give up interest in it. And when we run, just adjust the correlation state, you can open it smoothly. For example, you can use Notepad to edit a batch file whose content includes "assoc .xls = Excel.sheet.8" "ping 127.0.1 -n 10" "assoc .xls = CQQ" line. Then saved it as a "open.bat" file, which is simple, the first line uses the "assoc" command to set the correct associated relationship for ".xls" file. If you want to view the association relationship of the specified type file, you can execute the "assoc .xxx" command in the CMD window, "XXX" indicates the specific file extension.

The second line uses the ping command to detect the native IP, "- N" parameter specifies the number of probes, in general, detect about 1 second, here to detect 10 times 10 seconds, of course, you It can be determined according to the actual situation. Note that "127.0.1" here also represents the address of this unit, which is equal to "". The third line re-associates ".xls" type to our custom type. First modify the extension of the file that needs to be protected, for example, rename "Wendang.xls" to "Wendang.cqq". This will not open it directly. When we need to use, run the "open.bat" file, double-click the "Wendang.cqq" file in the specified time interval, you can open it smoothly. The batch will then automatically modify the file-related state to prevent others from operating the file free.

Of course, for safety reasons, it is best to create a new account in the system (such as "Gly", etc.), set complex passwords for it. To store the batch file into the NTFS partition, click the "Add" button in the "Security" panel in its properties window, add the "Gly" account, and click the "Remove" button, delete the "Group or User Name" Other groups and accounts in the column. If some accounts cannot be deleted, you can click the "Advanced" button to cancel the "Permissions" panel in the pop-up window "With the permission item that can be applied to the child object", click the "Delete" button in the pop-up dialog box. You can clear all your accounts. Select the "Gly" account, check "Full Control" item in the permissions list, so that only the "GYL" account can operate the batch file.

For a general extension, we can clearly know its file type, but for uncommon extensions, or without extension, you want to identify its true identity, it is not so simple. . With FileTypeid this gadget, the problem can be solved. FILETYPEID can identify thousands of file types, running the program, dragging and dropping unknown types of files directly into the main interface of the program, click the "Details" button to display the details of the file, as shown in Figure 1. Click the "Analyze" button to display the file type of the file might attribute in the "extension" column in the recognition list, display the chance of matching the file type in the "Match" column, displaying the file in the "Type" column Type Description Information, according to this information, it is not difficult to find its true identity.

In addition, when you encounter an unknown type of file, you can use Baidu and other search engines to find the corresponding information. And if the processing method is simple in Windows 8, you can display all the programs that can handle the file in the system in the pop-ups in the pop-ups. After selecting the target program, check "All XXX files open", you can open this file using the program, otherwise, you can click "Find Apply in the App Store" item, you can use it in the app store. Find out the application corresponding to the file format, select the corresponding application item, view the description information, if appropriate, you can download and install the application.

Generally, no matter what type of file, a specific identifier is displayed in its starting part, such as for the EXE file, its identifier is "MZ". Use tools such as Notepad or WinHex to open the target file, find the identification information of its beginning, and then the online query will learn the specific file type. In addition, use the "translation expansion name" software to easily identify the actual type of files. Enter a file extension in the upper right corner in its main interface. Click the Query button to quickly find the instructions related to it, so you can understand the actual type. "Translation Exhibition" supports 6,113 file types, for some special file types, if you cannot identify, you can click the "Submit" button to send it to the author for screening.

Save disk space

can search all the .scr files in the system (type * .scr and search), delete it in the search results window. The .csr file to achieve the purpose of saving disk space. If you want to start the screen immediately, you can right click any of the .scr files and drag it to the desktop or "Start" menu (or one of them), and select "CreateshortCut". Then click on this ShoCRTUT to start the screen saver.

Clear the icon on the control panel

Sometimes these unwelcome icons are not carried by the Windows system control panel itself, but from other programs Not allowed to be installed. In this case, the reader is necessary to understand that the file extension of the icon of the most control panel is .cpi. Type * .cpi in the Windows system search function, you can list applications related to the control panel in the system. Then double-click the files that each Rusp, and filter out unwanted files. Move these unbolded files to another folder or make a backup and delete the original icon file. It is worth noting that multiple icons in the control panel may represent only one .cpl file. For example, if you delete the main · CPL file, the keyboard, mouse, and printer icons are deleted.


In Windows Control Panel - Default - Settings, you can find this Windows almost all file types, you can find names here. Describe and related programs (current default).


Bulk modification file extension, many software can be easily implemented. Sometimes, you need to modify a certain type of file under a folder into other file formats, how can I change the file extension quickly? User familiar with the DOS command can be implemented with the ren command, but its function is not strong enough, and it is not convenient for some primary users, and the ExtConvert tool can be used. The program can be operated under Windows 2000 / XP / 2003, unavailable under Windows 98 and so on.

Run EXTCONVERT, select the file directory where the conversion file is located, the method is to click the "Browse" button in the main interface. In the pop-up folder dialog box, select the directory to be converted to the file; then set the extension Name conversion rules, add-to-conversion, and converted extensions, can be adjusted by clicking on the upper and lower arrows on the right side of the list; it is important to note that the conversion and conversion extensions are arranged in accordance with the order corresponding. If you select the "All Sub Directory" item, the program will traverse all the files and sub-file directories in the selection directory. After the

setting is complete, click the "OK" button to pop up the prompt window "You want to start the file extension", click "Yes" to conversion, you can see the result output column. Go to the list of converted files.

Show hidden settings

Microsoft has started hiding file extensions from the Windows 95 system. You want to see the extension of the file, you should open the resource manager (WindowsExplorer) or other Windows folder, select "View" a "folder option" or "tool" one "folder option" (which one is selected Depending on the WMDOWS version you use). Then click on the "View" to ensure that "Hide Extensions for Known File Types" is canceled, then click "Finish". This will see the extension of almost all files in the computer. The file type option in the

Folder Options dialog lists the extension registered in the system, and the registration representation can identify and process the file type. If you open the "View" "Details" in the Explorer, you will see a description of the file in the file type column. However, in the Windows 9x series, you can only see its extension below when one of the registration file types is selected. If you want to edit your system registry, you can select some file extensions to mask them, then display the extension of the remaining parts.

Important Extension

Executable File

Computer can perform a related program in accordance with the instructions in the executable (.com or .exe). If you receive an anonymous file (such as active email), you do not perform it. Because the sender may not be good. In addition, many worm can be propagated by email address book. In this case, it may also receive the infected mail sent by the disseminator. Therefore, unless you call and generate email with this friend confirmed that the file is secure, do not open this executable. Also. Bat files and .cmd files also contain some executable commands, so there may be a virus code.

Script Destruction Program

The script file consists of some artificially identifiable program code, which can be converted into executable machine code instructions. When you double-click a script file, the Windows system executes a script service (scriptserviees). Some script files are often encountered when searching or performing some other tasks online, but may not want some old script files to run on a computer. The script file extension running with the following procedures is careful: WindowsscriptHost (· WS, .WSE, .WSO, JavaScript) and VisualBasie (VB, .vbe, .vbs).

Other services Perform extensions

If a file extension is related to a Windows service, then this service will be hit and follow the file. The instructions are running. Such files are mapped to the name including .pif, .mis, .hta and · Scro.

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