Posted August 30, 200717 yr Have a customer rolling out thousands of PC's using XP SP2 with .Net Framework Ver 1.1 installed and a custom application built for 1.1. They have rolled out their first 50 all using the same sysprepped image. Some of the units out of the box would not run their custom application and other ones appeared to work at first but the application would stop working after a reboot some time later. Customer gave me a unit where the application is working as expected and one where it no longer functioned. I have determined that the perfc009.dat file located in C:\windows\system32 appears to be causing the issue. To repair the unit I can do one of 3 things: 1) Replace perfc009.dat file with the same file from the working unit. 2) expand the base copy of the file from the C:\i386 directory 3) Uninstall .Net 1.1 and reinstall .Net 2.0 instead Please note for option 3, I must uninstall .Net 1.1, simply installing .Net 2.0 does not fix the issue. Also if I reinstall .Net 1.1 again afterwards it will adjust somehow the perfc009.dat file and again their .net app will no longer function. Bottom line is it appears the perfc009.dat file is getting corrupted, while I do currently have a workaround, I need to understand why it is geting corrupted and what I can do to stop it from happening.
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