Archives contained in files of the rar format usually have a "safety margin", since this format provides for the addition of a certain amount of information to the file for recovery. This quantity can be changed, and if it is necessary to repair a damaged file, no additional software, except for the archiver itself, is required.
Necessary
WinRAR archiver
Instructions
Step 1
Start the archiver program. WinRAR's interface is similar to that of Explorer, where your computer's directory tree is located in the left pane. Move along this tree to the folder containing the damaged file and select it in the right pane.
Step 2
Run the file recovery wizard in the archiver. This can be done by pressing the combination of "hot keys" alt="Image" + r or through the section "Operations" in the program menu, where you should select the line "Restore archive".
Step 3
Specify the format of the damaged file by checking the RAR or ZIP box of the window that opens. Here you need to specify the location of the corrected file. When restoring an archive, WinRAR does not make any changes to the original file, but creates a separate copy, giving it the name of the original with the added rebuilt or fixed prefix. The location for saving this new file must be specified in the field located under the inscription "Folder for recording the restored archive". It can be entered manually or selected in the dialog box that opens by clicking the Browse button. By default, this field contains the address of the folder in which the original file is located.
Step 4
Click "OK" and the restore operation will start. The archiver will inform you about its progress, and upon completion, the window with the report will remain on the screen - after reading it, click the "Close" button.
Step 5
Recovery information is written to a file when the archive is created and, by default, it is allocated one percent of the total file size. If the contents of the archive are of particular value, then it is better to increase this setting to five percent. The corresponding setting is placed on the "Advanced" tab of the window that opens before starting the archiving procedure. On the "General" tab of the same window, there is a checkbox "Add information for recovery", which determines whether information for recovery will be added to the archive.
