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PID (Process Identifier)
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A number that uniquely identifies a process while it runs.
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User Name
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The user account under which the process is running.
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Session ID
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A number that identifies the owner of the process. When multiple users are logged on, each user has a unique session ID.
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CPU Usage
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The percentage of time that a process used the CPU since the last update (listed as CPU in the column heading).
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CPU Time
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The total processor time, in seconds, used by a process since it started.
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Memory - Working Set
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Amount of memory in the private working set plus the amount of memory the process is using that can be shared by other processes.
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Memory - Peak Working Set
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Maximum amount of working set memory used by the process.
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Memory - Working Set Delta
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Amount of change in working set memory used by the process.
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Memory - Private Working Set
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Subset of working set that specifically describes the amount of memory a process is using that can't be shared by other processes.
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Memory - Commit Size
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Amount of virtual memory that's reserved for use by a process.
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Memory - Paged Pool
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Amount of pageable kernel memory allocated by the kernel or drivers on behalf of a process. Pageable memory is memory that can be written to another storage medium, such as the hard disk.
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Memory - Non-paged Pool
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Amount of non-pageable kernel memory allocated by the kernel or drivers on behalf of a process. Non-pageable memory is memory that can't be written to another storage medium.
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Page Faults
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The number of page faults generated by a process since it was started. A page fault occurs when a process accesses a page of memory that's not currently in its working set. Some page faults require page contents to be retrieved from disk; others can be resolved without accessing the disk.
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Page Fault Delta
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The change in the number of page faults since the last update.
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Base Priority
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A precedence ranking that determines the order in which the threads of a process are scheduled.
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Handles
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The number of object handles in a process's object table.
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Threads
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The number of threads running in a process.
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USER Objects
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The number of USER objects currently being used by the process. A USER object is an object from Window Manager, which includes windows, menus, cursors, icons, hooks, accelerators, monitors, keyboard layouts, and other internal objects.
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GDI Objects
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The number of objects from the Graphics Device Interface (GDI) library of application programming interfaces (APIs) for graphics output devices.
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I/O Reads
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The number of read input/output operations generated by the process, including file, network, and device I/Os. I/O Reads directed to CONSOLE (console input object) handles aren't counted.
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I/O Writes
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The number of write input/output operations generated by the process, including file, network, and device I/Os. I/O Writes directed to CONSOLE (console input object) handles aren't counted.
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I/O Other
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The number of input/output operations generated by the process that are neither a read nor a write, including file, network, and device I/Os. An example of this type of operation is a control function. I/O Other operations directed to CONSOLE (console input object) handles aren't counted.
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I/O Read Bytes
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The number of bytes read in input/output operations generated by the process, including file, network, and device I/Os. I/O Read Bytes directed to CONSOLE (console input object) handles aren't counted.
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I/O Write Bytes
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The number of bytes written in input/output operations generated by the process, including file, network, and device I/Os. I/O Write Bytes directed to CONSOLE (console input object) handles aren't counted.
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I/O Other Bytes
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The number of bytes transferred in input/output operations generated by the process that are neither a read nor a write, including file, network, and device I/Os. An example of this type of operation is a control function. I/O Other Bytes directed to CONSOLE (console input object) handles aren't counted.
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Image Path Name
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The location of the process on the hard disk.
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Command Line
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The full command line specified to create the process.
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User Account Control (UAC) Virtualization
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Identifies whether User Account Control (UAC) virtualization is enabled, disabled, or not allowed for this process. UAC virtualization redirects file and registry write failures to per-user locations.
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Description
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The description of the process.
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Data Execution Prevention
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Whether data execution prevention is enabled or disabled for this process. For more information, see What is Data Execution Prevention?
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