Process Lasso

Server Edition

Real-Time CPU Optimization and Automation

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Compatible with Windows Server 2012, 2012R2, 2016, and 2019


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

Real-Time Apps

Ensure optimal performance for real-time applications

Process Watchdog

Create rules to take action on a process when a threshold is reached


Max performance when in use, but conserve energy when idle

Audit System Activity

Log and audit process launches and other selected system activity


Algorithms such as the CPU Limiter, Instance Balancer, and Group Extender

Make Processes Run Your Way!


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

Limiting CPU Use on Windows Servers

There are several features of Process Lasso that can limit or mitigate the effects of high CPU use on Windows Servers.

  1. The CPU Limiter feature allows you to set rules that will limit a process’s CPU consumption by dynamically constraining its CPU affinity (set of CPU cores it can use). For any hard limits on CPU use, this is recommended. Rules are fairly robust. Please see this page for more information.
  2. The ProBalance algorithm is quite effective at improving responsiveness during high CPU loads.
  3. Persistent CPU affinity and priority rules will enable you a greater degree of control of the allocation of CPU resources.

Process Lasso Server Edition has a 30-day free trial, so give it a spin!

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!

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.

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.

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.

Process Lasso offers several compelling automation and control features for system administrators. Rules can be created to take full control of how applications are run on the server, enforcing settings and limits of various types, including CPU affinities. With algorithms like our CPU Limiter, administrators can prevent users or applications from monopolizing server resources and degrading the responsiveness of other sessions.

Best of all, Process Lasso has an independent core engine called the Process Governor. It can be configured to run as a service and is responsible for applying process rules and algorithms. The Process Lasso GUI that hosts the system tray icon is entirely optional.

Since server administrators need to evaluate the full capabilities of the product, we offer a trial edition of Process Lasso Server Edition. It includes all features of the software, but will expire after 30 days. If you have any questions, please contact us!

Process Lasso 10.3 – Config Profile Switcher

Process Lasso v10.3 adds the Config Profile Switcher, special ProBalance handling for SearchIndexer.exe, and much more!

Process Lasso 10.2 – Core Work

Process Lasso v10.2 improves ProBalance, refactors foreground boosting, adds an Internet Explorer restriction feature, supports Windows 11, and more.

Process Lasso 10.1 – Darker Dark Mode

Process Lasso v10.1 has arrived! This version improves dark mode by adding a dark menu bar, status bar and CPU core graphs.

Process Lasso is available in English, German, Russian, Slovenian, Spanish, Polish, Finnish, PT-BR, Japanese, and Chinese (Simplified and Traditional).