GrooveMonitor is a service utility that tracks groove behavour and creates reports for error reporting to MS (what else does it report?). It loads on startup. It gets installed when you install Office 2007. However it doesn't get uninstalled when you uninstall Office 2007. GrooveMonitor starts upon Windows startup (via registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run). In the words of one of my pained reader:

Dear Angsuman,
I was "hit" by the WGA notification this morning (a year after I installed my Windows). Fortunately, I was able to find your blog and your 3 simple steps solved the problem like a charm. Thank you!

Perhaps you would know how to solve another "Microsoft" problem: Some time ago I have tried Microsoft Office 2007 (and hated it). After un-installation, however, the thing keeps loading GrooveMonitor, and keeps trying to do it even though I have deleted all reference to it from my hard disk (when I delete it from the Registry, it re-appears misteriously).
With best regards,
Gregory

You bet!

To remove GrooveMonitor from your machine you have to go to Control Panel and then select Add/Remove programs. GrooveMonitor is one of the displayed applications. Uninstall it from there. That should do it for any normal windows program. Not surprisingly Microsoft himself often violates this basic principle (which surprisingly would give you more control over their crappy [pardon my French] software), and GrooveMonitor will still load on startup.

You can however use msconfig to prevent it from coming up on Windows startup.
1. Go to Start menu and click Run
2. Type msconfig and press Enter.
3. Go to Startup tab and then uncheck any reference to "groovemonitor"
4. Reboot

Note: Some malware may also camouflage themselves as GrooveMonitor.exe, particularly if they are located in c:\windows or c:\windows\system32 folder.

GrooveMonitor is currently owned by Microsoft Corporation.