The following is a known issue with SharePoint 2010, since it has been released as RTM.
However, there is no ‘real’ solution neither explanation on why this is happening.
Here is solution, but not an explanation 
.
First, the issue:
The following events are logged on the application event log:
Log Name: Application
Source: MsiInstaller
Date: 26/11/2010 14:41:43
Event ID: 1004
Task Category: None
Level: Warning
Keywords: Classic
User: NETWORK SERVICE
Computer: <computer name>
Description:
Detection of product ‘{90140000-104C-0000-1000-0000000FF1CE}’, feature ‘PeopleILM’, component ‘{1C12B6E6-898C-4D58-9774-AAAFBDFE273C}’ failed. The resource ‘C:\Program Files\Microsoft Office Servers\14.0\Service\Microsoft.ResourceManagement.Service.exe’ does not exist.
Log Name: Application
Source: MsiInstaller
Date: 26/11/2010 14:41:43
Event ID: 1001
Task Category: None
Level: Warning
Keywords: Classic
User: NETWORK SERVICE
Computer: <computer name>
Description:
Detection of product ‘{90140000-104C-0000-1000-0000000FF1CE}’, feature ‘PeopleILM’ failed during request for component ‘{1681AE41-ADA8-4B70-BC11-98A5A4EDD046}’
Then, the solution:
Open Windows Explorer and browse to C:\Program Files\Microsoft Office Servers
Right click on the 14.0 directory and go to the Security tab
Add Network Service with Full Control rights
Et voilà, no more event logged.