1. Click the Start button.
  2. Type “command” in the search box… DO NOT hit ENTER yet!
  3. While holding CTRL-Shift on your keyboard, hit ENTER.
  4. You will be prompted with a permission dialog box.
  5. Click Yes.
  6. Type the following command: regsvr32 /u ipsecsvc.dll.
  7. Hit ENTER. This will UN-REGISTER your file.
  8. Type the following command: regsvr32 /i ipsecsvc.dll.
  9. Hit ENTER. This will RE-REGISTER your file.
  10. Close the command prompt window.
  11. Re-start the program associated with ipsecsvc.dll error.
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