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Process Lasso is Windows process automation and optimization software. From tuning algorithms like ProBalance to user-made rules and persistent settings like CPU affinity and priority classes, Process Lasso provides full control over running applications!

Our famous ProBalance algorithm maintains system responsiveness under high CPU load. This proprietary algorithm dynamically adjusts the priorities of running programs to keep problematic background processes at bay. With ProBalance, single or multiple processes will no longer be able to bring the system to a virtual stall. Process Lasso allows you to continue interacting with your computer, even when it is under heavy CPU load. Try our CPUEater demo to experience ProBalance for yourself.

Process Lasso also allows users to automate and adjust how applications run through a number of unique and useful features. These include persistent priority classes, persistent CPU affinity, disallowed processes, per-process power profiles, a process watchdog for advanced rules, limits on the number of process instances, multi-instance balancing, and much more! These features give you the ability to control how programs use your computer’s resources based on automatically applied settings. With Process Lasso, you can decide exactly how you want your processes to run.

Process Lasso is the ultimate Windows CPU affinity changer. The CPU affinity specifies the set of CPU cores an application is capable of running on. With Process Lasso, you can control this with a persistent setting that applies every time the application runs, or change it dynamically while the application is running when a threshold is reached. The CPU affinity is usually changed to limit CPU usage or improve performance.

Many additional features such as power plan automation, a system response measurement and process activity logging are also available.

For minimal resource usage, all algorithms and process rules are enforced by a standalone background service called the process governor. The GUI is completely optional.

Characteristics

• Persistent CPU affinity, priorities and more
• ProBalance priority optimization
• Proprietary response calculation
• Rules for acting on processes when thresholds are exceeded
• Limit process CPU usage
• Automate power plan switching
• Disable Hyper-Threading/SMT per process
• Balance multiple instances
• Limit instances of applications
• Do not allow processes to run
• Keep processes running (automatic restart)
• CPU affinity switcher
• Keep your PC awake
• Native C++ for maximum efficiency
• Standalone background service applies rules

What is new

• Install: Enable Spanish language selection
• GUI: Product Activator improvements
• GUI: When filter editor controls have focus, TAB can escape to their respective list view
• GUI: Add dark mode to some frequently seen dialogs
• Core/GUI: Default log entries for core parking adjustment to ON (when done by ProBalance, if option is set)
• Core: Fix an issue where some log entry types could continue to be emitted despite logging being disabled
• GUI: Add menu items to toggle between CPU set logging and Group Extender rules
• Core: Adapt ProBalance option ‘Disable CPU Core Parking during action’ to Intel 12th Gen
• Core: Change fail-safe recovery core parking options from HKCU to HKLM (used after wrongly terminating controller if ProBalance option ‘Disable CPU core parking during action’ was used)
• GUI: Fix an issue where deleting the log while it is being updated could freeze
• Core: Fix an issue where a Watchdog rule that restarts a service cannot do so
• GUI/LogViewer: Minor improvements to the log monitoring thread
• GUI/LogViewer: Use filesystem change notifications on UNC paths when available
• GUI.WatchdogRulesDialog: Fix an issue where completely clearing the rules list using the Clear button would not immediately commit to the INI on save
• LogViewer: Add CTRL+X accelerator to clear the log
• GUI.PriorityClassRulesDialog: Extended width and other cosmetics
• GUI.ProBalanceExclusionsDialog: Fix handling of match strings with embedded commas
• GUI/Core: Refactor priority class rules, now supports regular expressions
• GUI.ProBalanceExclusionsDialog: Cosmetic
• GUI: Add dark mode support to activation dialog