Shlwapi.dll is a dynamic link library file that is located where the operating system Windows is installed to on your machine. Shlwapi.dll is a file that does many important things for the web browsers within the system. The biggest thing that this file does is that it keeps track of website urls as well as UNC paths and many registry settings related to internet browsers.
There have been issues that have been encountered in the past, typically with users of Windows XP as well as users that have upgraded, with Shlwapi.dll error messages and listed below will be ways of seeing how to fix the problems.
The first thing to determine if your system was affected by any of the updates from Windows is to see if there have been any updates done to your system. Typically the Service Pack updates will not be done automatically and to proceed with them the user must advise the system to update. If your system has just an update there is a possibility that it is the cause of the Shlwapi.dll error messages that are starting to appear. If you are now on Service Pack 1 of Windows XP then the best thing to do is to update to the current Service Pack that is offered by Microsoft to get rid of the annoying Shlwapi.dll error messages.
The cause of the Shlwapi.dll appears to be that when updating the important files with the Service pack updates is that some of the files did not in fact get copied over. In this case Shlwapi.dll is not updated with the rest of the system, and is sometimes removed which then causes error messages to appear. These Shlwapi.dll error messages are appearing because the system is looking for either the newer version of Shlwapi.dll or the file Shlwapi.dll itself is now missing.
As Shlwapi.dll is located in the registry the best thing to do to resolve these error messages quickly and easily is to download a registry cleaner. Registry cleaners will do a complete and deep scan, of the registry as well as quickly identify issues that are causing problems within your system.
Many dll files, including Shlwapi.dll, can become corrupt, modified or deleted during upgrades to the core of the operating system, which is why using registry cleaners to fix Shlwapi.dll error messages is the best and easiest way to fix the issues.