Process Lasso is Windows process automation and optimization software. From tuning algorithms like ProBalance to user-created rules and persistent settings such as CPU affinities and priority classes, Process Lasso enables full control over running applications!

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

Process Lasso also allows users to automate and tweak how applications are run through a number of unique and helpful functions. These include persistent priority classes, persistent CPU affinities, disallowed processes, per-process power profiles, a process watchdog for advanced rules, process instance count limits, multiple instance balancing and much more! These features give you the ability to control how programs utilize 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 able to execute on. With Process Lasso, you can control this with a persistent setting that applies every time the application is run, or change it dynamically while the application is running once a threshold is met. The CPU affinity is commonly changed to limit CPU use or improve performance.

Many additional functions such as power plan automation, a system responsiveness metric and process activity logging are also available.

For minimal resource use, all algorithms and process rules are enforced by a stand-alone background service called the Process Governor. The GUI is entirely optional.


  • Persist CPU affinities, priorities and more
  • ProBalance priority optimization
  • Proprietary responsiveness metric
  • Rules to act on processes when thresholds exceeded
  • Limit process CPU use
  • Automate power plan switching
  • Disable Hyper-Threading/SMT per-process
  • Balance multiple instances
  • Limit instances of applications
  • Disallow processes from running
  • Keep processes running (auto-restart)
  • CPU affinity changer
  • Keep PC awake
  • Native C++ for maximum efficiency
  • Stand-alone background service applies rules

What's New:

  • Add CTRL+SPACE keyboard accelerator to pause GUI display updates
  • ‘Start Process Lasso with power profile’ now acts as a base power profile when no power rules active
  • Minor fixes and enhancements
    • (1) Core: Minor adjustment to Windows Error Reporting (WER) snapshot process handling
    • (1) GUI: Add CTRL+SPACE keyboard accelerator to pause GUI display updates
    • (3) GUI/Core: When no power profile rules are in effect, return to set 'Start Process Lasso with Power Profile'
    • (5) GUI: Add message when user attempts manual switch of active power profile when 'start with' (base) power profile is set
    • (7) GUI: Don't remove processes from listview while in the context menu. Fixes crash seen when process removed while taking action on it via context menu.
    • (9) GUI: Remove 'Help / Change License Code' menu item when not activated
    • (9) GUI: Fix activation code change wouldn't refresh licensee name on graph until app restart
    • (11) All: (c) 2021 to 2022
    • (11) GUI: Add menu item to toggle ProBalance option to lower to Idle instead of Below Normal
    • (13) GUI: Add submenu 'View / Reset'
    • (13) GUI: Add menu item 'View / Reset / Reset ProBalance Counters'
    • (13) GUI: Move process context menu item 'Keep Running' to 'More' submenu
    • (13) GUI: Improve consistency of process context menu items for Hard Throttling
    • (13) All: Minor code maintenance