The file a0013811.dll is a part of the installation or removal of Cisco’s Configuration Manager Win32 Interface. This is a web-based structure of network management systems.
Naturally, end users find themselves wanting to fix the program on their own. It’s possible, but not the easiest or safest thing to do—go online and download the file, and hope that the version you are downloading is the same as the one on your operating system.
In any case, the error could be due to the file remaining on the system after it was uninstalled. The best thing to do is find a good registry cleaner that will back up your computer each time you run a scan. You can defrag and optimize your computer on a regular basis–hassle free.
To keep your computer running like new, click here for a free scan. ZookaWare PC Cleaner offers their registry cleaner for a low price of $29.95.