How to Update Zlib1.Dll in Windows XP

1. Press the Windows logo and 'R' keys manually to display the 'Run' dialog box. Type 'cmd' without quotation marks into the box and press 'Enter.' The command prompt will appear.
2. Type 'regsvr32 /u zlib1.dll' and press 'Enter.' This command unregisters the ZLIB library from the computer. Minimize the command prompt window and open your Web browser.
3. Browse to the ZLIB website using the link in the 'Resources' section of this article. Scroll to the 'ZLIB Compiled DLL' heading and click the download link closest to you. Extract the archive to the location of your choice. In the archive, you will find the file 'ZLIB1.DLL.'
4. Click the 'Start' button, then 'My Computer.' Browse to 'C:,' 'Windows' and 'System32.'
5. Drag the file ZLIB1.DLL to the 'System32' folder.
6. Return to the command prompt window. Type 'regsvr32 c:\windows\system32\zlib1.dll' and press 'Enter.' The updated file will be registered.