There is another thread with solution to the issue, but it has an error in the "instructions" and the thread is to old to reply to. So....... 1. Open a command prompt by clicking Start Run. Type cmd and click OK. 2. In the command prompt window, type NET STOP WINMGMT /Y and press ENTER. 3. Type REN %WINDIR%\SYSTEM32\WBEM\REPOSITORY REP.OLD and press ENTER. 4. Type EXIT and press ENTER to close the window. Restart the system. Windows should start normally, but you may be prompted to restart the system once more to complete the changes caused by resetting the core repository. You may also need to restart once more if Windows Security Center still does not detect your ESET security product.