If your error report is associated with file called a0001728.dll, something went wrong with the installation or removal of a program. The a0001728.dll file is associated with the IIS NT specific library. This is a Microsoft application that allows advanced setup of Internet services.
Finding a0001728.dll error may be a warning of something bigger going on with your computer. When your registry starts listing errors, it could mean that a virus or adware was attached to a registry file you downloaded. In some cases, spyware will disable certain files in a registry.
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