How to Replace an Infected .dll File

These instructions will allow you replace a .dll file with a fresh copy without reinstalling the entire program or operating system that uses the .dll file.

Instructions

1. Right-click on the icon of your source media. Click on "Search."

2. Search for the compressed file you will use to replace your existing file. The name is in the format name.ex_ (for example if my.dll is to be replaced, you will search for my.dl__). Make sure that system and hidden files are checked in the search dialog box.

3. Open a command prompt window.

4. Using the path to the file you need to replace and the information from the search in step 2, type the following command:

   EXPAND path\my.dl_ path\my.dll

   For example, if my.dll is in the windows/system32 directory on the C: drive and my.dl_ was found in the i386 directory of the E: drive, your command would be as follows:

   EXPAND E:\i386\my.dl_ C:\windows\system32\my.dll

Tips & Warnings

• If you get a command not found error, You may need to type the path to the EXPAND command. For example C:\windows\system32\EXPAND....

• Use this procedure carefully and as a last resort. Try reinstalling the program or, if possible, Windows before using this procedure. The file being replaced my have been updated by a Windows Service Pack or another installed program. If the original version is no longer compatible, the system may not boot after the file is resored.