>>From time to time I see dfrgntfs.exe running as a process on my
>computer. Apparently it is defragmenting the harddisk when the system
>has been ideal for a period. How do I disable this service? Task
>scheduler is btw enabled but doesnt contains any reference to the exe.

This is not a service and does NOT run all by itself. You might have a
malware that's been named dfrgntfs.exe so you ought to run antivirus
or spyware/malware scanner pronto.

- Thee Chicago Wolf