Be sure that all windows are closed. Click on START-> RUN. Copy paste the following as it is and click OK.
regsvr32.exe /U ddcca.dll
You should get a message that it has been uninstalled succesfully.
Do the same for this one:
regsvr32.exe /U jkhfg.dll
Then be sure that all windows are still closed.
Run hijackthis. Hit None of the above, just start the program button. Put a check on these.
O20 - Winlogon Notify: ddcca - C:\WINDOWS\system32\ddcca.dll
O20 - Winlogon Notify: jkhfg - jkhfg.dll (file missing)
Hit FIX CHEKED button.
Delete these files if listed: