Maintains system responsiveness during high CPU loads

Performance Mode

Bitsum Highest Performance power plan for ultimate performance

Responsiveness Metric

Monitor system responsiveness with our proprietary metric


Automate and persist CPU affinities, priorities and more


Max performance when PC is active, but conserve energy when idle


Stand-alone core engine, silent install, automatic updates and native 64-bit

Real-Time Apps

Ensure optimal performance for real-time applications

Audit System Activity

Log and audit process launches and other selected system activity


Time-tested for more than 15 years. Safe and conservative

Make Processes Run Your Way!

Process Lasso Boxshot

Process Lasso

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 you 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 so that some are given higher priority access to the CPU(s) than others. 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.

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.

Some of the many features

  • Persist CPU affinities, priorities and more
  • ProBalance dynamic adjustments
  • Proprietary responsiveness metric
  • Rules to act on processes when thresholds exceeded
  • Automate power plan switching
  • Disable Hyper-Threading/SMT per-process
  • Balance multiple instances
  • Limit instances of applications
  • Prohibit processes
  • Keep processes running (auto-restart)
  • Evenly spread multiple instances
  • Stand-alone background core engine applies rules
Process rules, persistent CPU affinities and priority classes, automated optimization, application prohibitions, load balancing, power plan automation and more! Windows
4.4 / 1244
Pro upgrade price: $36.00 USD

Betanews on ProBalance:

Process Lasso’s headline technology is ProBalance, a smart tool which monitors running processes and intelligently adjusts the priority of resource hogs as they appear.

Can this really make a difference? We used the developer’s (Bitsum) “CPUEater” demo to create a process with 48 active threads, and tried launching Chrome (with its core files cached). It took 30-40 seconds to appear with ProBalance disabled, under 1 second with it turned on.

That was a very extreme example, so we tried again with 16 threads (one per core), and Chrome loaded in 5 seconds; 8 threads and it loaded in around 2, still more than twice the ProBalance-enabled time.

We tried a few other CPU-stressing apps with similar results. If you’re running multiple applications at the same time, and something tries to hog your CPU, then Process Lasso’s priority tweaks generally mean your system stays very responsive.

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