lsass.exe loads 11000 files from profile (...application data\Microsoft\Protect\S-1-5...) results in CPU usage 90% for 15 minutes

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Hi!

I've a problem with one user-profile on our home computer. The
user-profile has 11000 files in the folder "...application
data\Microsoft\Protect\S-1-5..." named 394085c9-8c6e-2932-7d63ce6b27ed
and similar. If the user logs into the computer lsass.exe tries to load
all this files which takes about 15 minutes, where the CPU usage is up
to 75-90% which allows no working. After this the computer works fine.
But after maybe one hour the lsass tries again to process the files,
which locks the computer again for 15 Minutes.

I've read about many issues in lsass.exe, but they all should be
resolved in Windows XP SP2, with all updates installed.

- So can somebody tell me if I just can delete this files?
- What are this files?
- Why is lsass.exe processing this files?
- Where do this files come from? Other profiles just have a hand full of
the files?

Regards
Jan
.

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