Process Lasso Pro $32.95
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Windows 10 Ready!

Proof of Concept

See ProBalance in action! Try the CPUEater Demo. Don't trust your PC to just anyone. Process optimization must be done right. We are experts in our field and have fine-tuned ProBalance for over a decade.

ProBalance works right out of the box. No configuration necessary! Install Process Lasso and go!

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Process Lasso

Tame CPU hungry processes and take control of your PC!

  • ProBalance - Keep your PC responsive during high CPU loads!
  • Gaming Mode 2.0 with Bitsum Highest Performance power plan - new
  • IdleSaver - Run at maximum performance while active; conserve energy when idle
  • SmartTrim - The first-ever intelligent RAM optimizer - new
  • Real-time CPU affinity and process priority optimization!
  • Automate and control process settings and power plans
  • Light-weight native code with negligible resource use
  • Efficient stand-alone core engine that can run as a service
  • Unique system responsiveness metric to quantify your experience!
  • Compatible with Windows XP, Vista, 7, 8, and Windows 10
Download 32-bit Download 64-bit PURCHASE Why Pro?

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 "CPU Eater" 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."

- Betanews

Process Lasso is NOT yet another task manager. It is real-time process optimization and automation software. Priority optimization, affinity optimization, core optimization, automated rules, automated power profiles; you name it, and Process Lasso does it!

Process Lasso's most popular feature is the unique process optimization technology called ProBalance (Process Balance) that will improve your PC's responsiveness and stability by making intelligent dynamic adjustments to the priority class of background processes. Windows, by design, allows programs to monopolize your CPU without sufficient restraint -- leading to hangs, micro-lags, and delays in your keystroke or mouse actions. ProBalance intelligently adjusts process priorities so that badly behaved processes won't negatively impact the responsiveness of your PC. This has been proven to be safe and very effective, as you can see from our CPUEater demo.

Remember: No configuration is necessary. Install it, and forget it!

Process Lasso, and it's ProBalance algorithm, are as usual and efficacious for new PCs as they are for old PCs, especially since the speed of processors hasn't been increasing a lot in recent years, replaced instead by increased parallelism (more cores). In fact, a strong argument can be made that Process Lasso is now more useful and efficacious than ever!

In addition to ProBalance, there are countless features allowing the user to take full automated control of the processes on their PC. You can have a wide range operations performed, or settings applied, each time a process is run. Core optimization technologies allow you to choose on what CPUs/cores a process should run, as well as what their CPU priority class and I/O priority class should be. You can also disallow specified processes from running, log all processes run, and set various other process rules.


General PC Optimization
  • ProBalance retains system responsiveness during high loads by dynamic process priority and/or CPU affinity adjustments
  • Gaming Mode with Bitsum Highest Performance power plan - New version 2.0 of this feature!
  • SmartTrim - The first intelligent RAM optimizer - New
Process Settings Automation
  • Persistent (saved) CPU, memory, and I/O priorities, CPU affinities, and other process settings
  • Disallowed processes, terminate problematic processes every time they are seen running
  • Limit per-process CPU use by default CPU affinities
  • Instance limits, limit the number of instances a process may have per user session, or for the whole PC
  • Restart selected processes if they terminate, crash, or are closed
  • Watchdog allows custom rules. When processes go over a CPU or virtual memory threshold, one can execute a command, change their CPU affinity, process priority class, I/O priority, trim the working set, log the occurrence, and more!
  • Hyper-Threaded core avoidance
Power Profile Automation
  • IdleSaver - Run at maximum performance while active, but conserve energy when idle.
  • Application Power Profiles - switch power profiles when given applications are running. For instance, switch to 'High Performance' when you start a game
  • Anti-Sleep - Keep the PC and/or display awake when specified processes are running
  • Unique System Responsiveness calculation - Accurately shows responsiveness of your by percentage, based on real-time latency in the Windows user interface.
  • Stand-alone core engine that can run as a system service
  • Designed for multi-user environments
  • Control core parking, and visualize parked CPUs in real-time
  • Minimal resource use and totally optional GUI that goes into a sleep-mode when minimized to the tray
  • Log of processes launched, and statistics on process duration and average CPU use when they exit
  • Silent installer with command line switches for easy deployment
  • Optional password protection on configuration
  • Select and act on multiple processes at once
  • Expansive command line support for unattended (silent) installation and custom configurations
  • Great for Audiophiles
  • Automated updates
  • Localized to Chinese (Traditional and Simplified), German, French, Polish, Finnish, Italian, Japanese, Russian, Serbian, PTBR, and more!
  • Compatible with Windows XP, Vista, 7, 8, and Windows 10
  • So much more...

We have worked hard to make Process Lasso affordable for everyone. To facilitate this, Bitsum now offers subscriptions. Visit our new Process Lasso Sales site to see these options!

Try new subscriptions!

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Reviews / Awards

Betanews on Lasso 8 - Great review! on Lasso 8 - 5/5 stars

"Process Lasso Makes Windows Performance Optimization An Easy Task"
- MakeUseOf - Achieve Perfect Windows System Resource Optimization with Process Lasso

"... In addition to the famous ProBalance algorithm, Process Lasso offers a wide variety of ways to control how running programs are allocated to your CPUs. You choose the priority at which processes should run and on which CPUs they should run. It is simply your all-in-one automatic Windows process tuner!"
- Fiber Download Editor Review

Process Lasso Editor's Choice

5 of 5 stars

Process Lasso Reward 5/5

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Read more about our process priority optimization algorithm.