Unable to delete unwanted file

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Hello everyone,

I’m having some trouble deleting a file form my PC. Anyway, the file’s named perflib_perfdata.dat, and I’m not even sure when it appeared in my documents but when I try deleting I get a message saying: “Error Deleting File or Folder

Cannot delete Perflib_perfdata_904: It is being used by another person or program

Close any programs that might be using the file and try again. Ok”

Could it be a virus?

If someone knows the answer please share it, I’d be very grateful.

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Best Answer by frenanana
Best Answer
Best Answer
Answered By 0 points N/A #91914

Unable to delete unwanted file

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Hello! 

 
Perflib_perfdata.dat is not a virus. These files are generated by any application or program that installs a performance monitoring function such as Motherboard Monitor and Nero INCD. They normally disappear when you reboot your system. Trying to delete these files will not work and deleting them in Safe Mode only partially works. 
 
You can try deleting these files by disabling your Performance Logs and Alerts. 
 
To disable you Performance Logs and Alerts, click Start > Run.
 
Type services.msc and hit ENTER.
 
Select Performance Logs and Alerts and double click it. Then click the STOP button. In the Startup Type dropdown list, select Manual and click ok. 
 
After that, try deleting the files. If this doesn't work, you can use the unlocker program. Unlocker is an Explorer extension that will simply allow you to manage, delete, recover, convert, move, or monitor your computer files. You can download it here: http://download.cnet.com/Unlocker/3000-2248_4-10493998.html
Answered By 10 points N/A #91915

Unable to delete unwanted file

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Hi Tiffany,

Try deleting the file in safe mode and see if that works. You can also try moving the file to a another folder for instance 'My Music' and while there try deleting the whole folder.

You could also try deleting it using unlocker which you can download for free by accessing the following site:

http://www.filehippo.com/download_unlocker/

Install unlocker, then go to the file and press delete. Unlock should then pop up, choose the option to delete the file completely.

Hope this helps.

Regards,

Lee Hung.

Answered By 0 points N/A #91917

Unable to delete unwanted file

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Normally Perflib_Perfdataxxx.dat files will get deleted by themselves. If
in use, you cannot delete them. Reboot and see if Perflib_Perfdataxxx.dat
files is still there.

Has nothing to do with Prefetch.

Here's more than you may want to know.

Perflib stands for Performance library. Perfdata stands for Performance
Data.

The %SystemRoot%System32Perflib_Perfdataxxx.dat files are created by the
System Monitor. And/or
%homedrive%LocalSettingsTempPerflib_Perfdataxxx.dat.
or
C:Documents and SettingsYour Name HereLocal
SettingsTempPerflib_Perfdataxxx.dat. When you shutdown normally, the file
should be deleted.

If you have an abnormal shutdown, these files can become orphaned, and
accumulate on your computer.

Under some yet to be determined circumstances, these files can become
orphaned during normal operation.

The Windows Performance tool is composed of two parts: System Monitor and
Performance Logs and Alerts. With System Monitor, you can collect and view
real-time data about memory, disk, processor, network, and other activity in
graph, histogram, or report form.

To open Performance…
Start | Run | Type: perfmon.msc | OK

You can view this by opening the Task Manager. The Performance tab displays
a dynamic overview of your computer's performance, such as CPU and various
kinds of memory usage.

Also caused by:
Rundll32.exe advapi32.dll,ProcessIdleTasks
Event ID: 1000
Event Source: LoadPerf

Perflib_Perfdataxxx.dat Files Accumulate Under %SystemRoot%System32
» http://support.microsoft.com/default.aspx?scid=kb;en-us;285798

—–

prflbmsg.dll = Perflib Event Messages

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWBEMCIMOM
Logging Directory
Value Type: REG_SZ
C:WINDOWSsystem32WBEMLogs

Repository Directory
Value Type: REG_EXPAND_SZ
%SystemRoot%system32WBEMRepository

Working Directory
Value Type: REG_EXPAND_SZ
%SystemRoot%system32WBEM

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionPerflib

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionPerflib

HKLMSOFTWAREMicrosoftWindows NTCurrentVersion
Perflib

Description
The Perflib subkey stores configuration data for the Windows Performance
Library, which collects and organizes data for performance tools, such as
System Monitor.

In addition to entries, the Perflib subkey contains a Language-code subkey
for each spoken language you configure for Windows 2000. The Language-code
subkey stores performance counter names and their descriptions in the
specified language. The Language-code subkey is named for the language code
for that language. For example, the counters and descriptions for the
English language are stored in a subkey named 009, the language code for
English (United States).

HKEY_LOCAL_MACHINESYSTEMControlSet001ServicesEventlog
Application Sources
REG_MULTI_SZ
Perflib

HKEY_LOCAL_MACHINESYSTEMControlSet001ServicesEventlog
ApplicationPerflib
EventMessageFile
Value Type: REG_EXPAND_SZ
%SystemRoot%System32prflbmsg.dll

HKEY_LOCAL_MACHINESYSTEMControlSet002ServicesEventlog
Application Sources
REG_MULTI_SZ
Perflib

HKEY_LOCAL_MACHINESYSTEMControlSet002ServicesEventlog
ApplicationPerflib
EventMessageFile
Value Type: REG_EXPAND_SZ
%SystemRoot%System32prflbmsg.dll

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesEventlog
Application Sources
REG_MULTI_SZ
Perflib

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesEventlog
ApplicationPerflib
EventMessageFile
Value Type: REG_EXPAND_SZ
%SystemRoot%System32prflbmsg.dll

Regards:saifiit

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