PCHEALTH collected data

I am using windows xp home edition +SP3
Since I have Diskeeper defragmentation allways working in the background I
noticed that on a regular base a lot of files
were created. They all are in \\WINDOWS\PCHEALTH\HelpCtr\DataColl\ and named
collectedData_numbers.xml etc. etc.
This list of datacollection is growing and I do not know what triggers the
creation of these files.
And I like to know which files can I delete and/or control the creation of
What program or process is depending on these xml files?

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