Question on Spybot results

[Zyzook]

I'm not entirely sure if this object that the Rootkit scan found is malware or not, but I figured it'd be best to seek help from professionals in the matter.
(I've attached the required Attach.txt in zipped format using the method of Right Click > Send To > Compressed Folder, but currently have WinRAR installed on my PC, so am unaware of whether or not that will affect your ability to open it.)

The object in question is:

Type: Key
Object: S-1-5-21-2625813189-2938010515-2775525617-1000
Location: HKLM\SOFTWARE\Microsoft\MediaPlayer\PREFERENCES\HME\
Details: No admin in ACL