Rapidly growing S-1-5-19 Folder

Giganews Newsgroups
Subject: Rapidly growing S-1-5-19 Folder
Posted by:  Bill (Bi…@discussions.microsoft.com)
Date: Tue, 2 Jun 2009

I detected a protected operating system folder S-1-5-19 that substantially
increases in size from week to week.  The folder path is C:\Documents and
Settings\Local Service\Application Data\Microsoft\Protect\S-1-5-19.

Checking folder properties, Size: 502 MB, Size on disk: 5.45GB, Contains:
1,431,130 Files, 1 Folder

The folder was created Sunday, January 25, 2009, 3:40:23PM.

Around that time, I downloaded a number of Express Edition programs (SQL,
C#, etc.) including Microsoft Sync Framework and Analysis Services earlier
that same day.

I have been spending a lot of time reading and working the C# exercises from
the APress book "Beginning C# 2008: From Novice to Professional" (which is
very good, by the way).

The downloaded Express Edition files are on a laptop running XP Home
Edition, and the C# project data files stored in an "untrusted" location on a
desktop running Vista Home Premium which is connected to the laptop via a
simple home wireless network.

I don't understand what is going on, and I'm not sure this is a security
issue.  I just want to get rid of all those pesky files in the S-1-5-19
folder somehow.  Please help me figure this thing out.