Performance monitoring for the plug-in cannot be initialized

I started seeing this when I came in this morning and I have no idea why the perf counter isn't loaded or unavailable. Where are the perf counter defintiion files so I can reload them

Type: Error
Date: 2/2/2007
Time: 9:45:44 AM
Event: 9501
Source: Office Server Search
Category: Plug-in
User: N/A
Computer: SERVER
Description:
Performance monitoring for the plug-in cannot be initialized, because the counters are not loaded or the shared memory object cannot be opened. This only affects availability of the perfmon counters. Restart your computer to fix this problem.

Type: Error
Date: 2/2/2007
Time: 9:45:44 AM
Event: 2406
Source: Office Server Search
Category: Gatherer
User: N/A
Computer: SERVER
Description:
Performance monitoring cannot be initialized for the gatherer service, because the counters are not loaded or the shared memory object cannot be opened. This only affects availability of the perfmon counters. Restart the computer.

Type: Error
Date: 2/2/2007
Time: 9:44:55 AM
Event: 2407
Source: Windows SharePoint Services 3 Search
Category: Gatherer
User: N/A
Computer: SERVER
Description:
Performance monitoring cannot be initialized for the gatherer object, because the counters are not loaded or the shared memory object cannot be opened. This only affects availability of the perfmon counters. Restart the computer.

Context: Application 'Search index file on the search server', Catalog 'Search'

Type: Error
Date: 2/2/2007
Time: 9:44:53 AM
Event: 9501
Source: Windows SharePoint Services 3 Search
Category: Plug-in
User: N/A
Computer: SERVER
Description:
Performance monitoring for the plug-in cannot be initialized, because the counters are not loaded or the shared memory object cannot be opened. This only affects availability of the perfmon counters. Restart your computer to fix this problem.

Type: Error
Date: 2/2/2007
Time: 9:44:53 AM
Event: 2406
Source: Windows SharePoint Services 3 Search
Category: Gatherer
User: N/A
Computer: SERVER
Description:
Performance monitoring cannot be initialized for the gatherer service, because the counters are not loaded or the shared memory object cannot be opened. This only affects availability of the perfmon counters. Restart the computer.

Thanks,
Colin