The constant hard disk - system and DiagnosticAgent.exe wrote to 300 different activity. Files of the PNF at a constant rate - starting programs negatively impaired.

Something similar to this began after a time, I was installing updates (somewhere in June or July). A month later, after I installed SP2 via the update, the problem presented differently (just as bad). Here's what I found recently of the reliability monitor and performance:

-DiagnosticAgent.exe > C:/windows/inf/infcache.0 = wr 1.5 MB/min x 2 (constant) (sometimes up to 6 x)

-System > loads of instances (~ 500) on. The files of the PNF in C:\Windows\inf\ =
mainly writing<100kB in="" but="" some="" write="" up="" to="">
-Diagnosticagent.exe > loads of instances (~ 500) on. The files of the PNF in C:\Windows\inf\ =
mainly writing<100kB in="" but="" some="" write="" up="" to="">

(total of instances of 1000 files .pnf; 300 different ones, several up to 12 instances of the same .pnf, half of them at least 4 instances of the same .pnf.)

I don't see many cases playback from the hard drive. Even at 100% highest active time, the graph of the disc in the performance bed also monitor, an average of only 2 Mbps. When Disk Defragmenter is running, it is an average of 50 MB/s.

This constant HDD activity about 1000 cases write in 30 minutes continuous .pnf files after startup and after awakening from sleep. While that happens, most of the programs, after loading, do not react for 5 minutes, then run as usual. Even the message control user account often fails to appear before it expires (in 2 minutes) during this time.

I tried Googling on hdd constant activity on the PNF files, but did not find much.

I will try using the restoration of the system again, although I had a few unsuccessful attempts with her.

I have Norton Antivirus installed, which scans for viruses periodically. It is not really the cause of this unknown and unusual hard disk activity I know.

Hi Tiscando,

Welcome to microsoft windows vista forums!

You did any recent changes of hardware on the computer?

Have you run a memory diagonstic test?

This question may be occurred due to services (3 programs) running during startup.

I suggest you put the computer in a clean boot and check:

http://support.Microsoft.com/kb/929135 - how to solve a problem by performing a clean boot in Windows Vista

(By putting the computer in clean startup - you can find which program is causing the problem)

Note: Turn the computer back to normal once the test is done.

Analyze the computer from infection by the virus:

http://www.Microsoft.com/security/malwareremove/default.aspx

In addition, see the following links:

http://support.Microsoft.com/kb/950684 - how to to solve performance issues during startup in Windows Vista

http://windowshelp.Microsoft.com/Windows/en-us/help/bc1393cf-9f9c-79c7-0f91-9337c2c41f811033.mspx ---> check your hard disk for errors

Let us know if that helps.

Thank you, and in what concerns:

Ajay k Microsoft support

Visit our http://social.answers.microsoft.com/Forums/en-US/answersfeedback/threads/ Microsoft answers feedback Forum and let us know what you think.

Tags: Windows

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