I'm on Windows [version 10.0.10586]. I was having slow loading and locks problems, so I opened logs to see if there was problems. I found some repetitive error: "WARNING, AdguardSvc, 93, 26.11.2015 12:56:04.822, TCP id=6604 Cannot get base url: System.IO.PathTooLongException: The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters. Source: mscorlib Stack trace: at System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths) at System.IO.Path.GetDirectoryName(String path) at Adguard.Filter.FilteringContext.GetBaseUrl(Uri uri, String host)" I found the "Reinstall Certificate" function in the program, I did it, and loading speed is back. But I have still some of those System.IO.PathTooLongException in the "service" log.