The reason that you failed to remove them from msconfig is probably that those two processes are still running while you do that; and they replace that startup registries immediately when you disable it.

All you need to do is restart in safemode and use msconfig to remove the startup process :
1) owjokuch rundll32.exe "C:\WINDOWS\system32\owjokuch.dll",s
2) wmjgenhj rundll32.exe "C:\WINDOWS\system32\wmjgenhj.dll",b
after that, reboot and they should be gone. Next, do a antivirus scan on your pc or manually delete those two files.

Hope it helps.