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Explorer.exe has a number of other processes associated with it.
It's most likely a sub-process or application that's running in the
background and taking all the CPU resources, which could be
the cause of your PC running slow.
To find and display what could be the problem try Process Explorer:
http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
SysInternals Forums: http://forum.sysinternals.com/
Worth Reading: The Case of the System Process CPU Spikes
http://blogs.technet.com/markrussinovich/archive/2008/04/07/3031251.aspx
Once you have Process Explorer installed and running:
In the taskbar select View and check:
'Show Process Tree' and the 'Show Lower Pane' options.
Move your mouse cursor over any column in the right hand pane
and right click and check the following boxes:
'Command Line' and 'Version'.
Next expand the process named 'Explorer.exe' (click on the + sign)
In the column on the left named 'CPU', look for any high CPU usage.
Next click on the CPU column to sort the processes by %CPU usage
(Highest to Lowest).
Now move the mouse cursor over any process, you should see a popup
with some detailed info.
With the mouse over the process that's using most or all the CPU %.
click on that process to highlight it, Now that it's highlighted,
right click and from the options listed select: 'Search Online'
This should display what out there on the web about that process.
You can also double click on any process to open up a more detailed
'Properties' window.
Note: some entries like Explorer, System/Services, and
Svchost entries may need to be expanded to show the detail (sub processes),
in this case click on the + located to the left of the entry.
An alternate method using Process Explorer is to double click on the
Graph located just below the Menu bar.
This will open the 'System Information' window, which has a larger display
of all three graphs.
Move your mouse over any spike in the CPU Usage graph to see what
process/application or service was the cause of the spike.
You can also Double click on Explorer.exe and in the popup window
select the 'Threads' tab, does any TID (thread id) have a high
CPU percentage (displayed to the right of the TID #)?
It's most likely a sub-process or application that's running in the
background and taking all the CPU resources, which could be
the cause of your PC running slow.
To find and display what could be the problem try Process Explorer:
http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
SysInternals Forums: http://forum.sysinternals.com/
Worth Reading: The Case of the System Process CPU Spikes
http://blogs.technet.com/markrussinovich/archive/2008/04/07/3031251.aspx
Once you have Process Explorer installed and running:
In the taskbar select View and check:
'Show Process Tree' and the 'Show Lower Pane' options.
Move your mouse cursor over any column in the right hand pane
and right click and check the following boxes:
'Command Line' and 'Version'.
Next expand the process named 'Explorer.exe' (click on the + sign)
In the column on the left named 'CPU', look for any high CPU usage.
Next click on the CPU column to sort the processes by %CPU usage
(Highest to Lowest).
Now move the mouse cursor over any process, you should see a popup
with some detailed info.
With the mouse over the process that's using most or all the CPU %.
click on that process to highlight it, Now that it's highlighted,
right click and from the options listed select: 'Search Online'
This should display what out there on the web about that process.
You can also double click on any process to open up a more detailed
'Properties' window.
Note: some entries like Explorer, System/Services, and
Svchost entries may need to be expanded to show the detail (sub processes),
in this case click on the + located to the left of the entry.
An alternate method using Process Explorer is to double click on the
Graph located just below the Menu bar.
This will open the 'System Information' window, which has a larger display
of all three graphs.
Move your mouse over any spike in the CPU Usage graph to see what
process/application or service was the cause of the spike.
You can also Double click on Explorer.exe and in the popup window
select the 'Threads' tab, does any TID (thread id) have a high
CPU percentage (displayed to the right of the TID #)?