MeterSeeFree Browser DiagnosticsNo Account · Local Processing
English
Private by designMedia and test results are processed in this browser. MeterSee does not upload them.

Why is my computer so slow?

Run a quick screen or a consented deep browser check, follow plain-language Windows, Mac, or Chromebook steps, and get an evidence-based conclusion before downloading cleaners, drivers, or unfamiliar repair software.

Computer slowdown diagnostic

Choose a quick screen or consent to a deeper browser workload, then add readings from your computer for a conclusion-first report.

Step 1 of 5
  1. 1Browser checks
  2. 2System readings
  3. 3Storage & startup
  4. 4Symptoms
  5. 5Report
1

Choose how deeply to check the browser

The quick screen takes about seven seconds. The recommended deep check takes about 25–35 seconds and adds repeatable calculation, memory-buffer, temporary browser-storage, sustained responsiveness, and WebGL workloads.

  • Neither mode opens files, lists applications, scans malware, reads temperatures, or reads drive health.
  • Performance rates are comparison baselines for this browser and computer—not universal hardware scores.
  • Keep the tab visible. A hidden tab produces an incomplete result instead of a misleading grade.
Recommended for a stronger report

Deep browser check

25–35 sec

This intentionally creates a short, controlled browser workload. The fan may speed up briefly. MeterSee uses at most four Web Workers, one 32 MiB memory buffer, 16 MiB of temporary origin storage, and a seven-second WebGL workload.

Do not run the deep checkif the battery is swollen, the computer smells burnt, feels dangerously hot, has liquid damage, or repeatedly shuts down during light use. Turn it off, unplug it if safe, and use the manufacturer or a trusted repair service.
For best results, connect power, close active downloads, and keep this tab visible.
Faster, limited screenQuick browser check

Use this when you cannot run the recommended workload. It provides less evidence, but you can still complete the guided report.

No permission is required.
2

Copy the readings shown by your computer

Choose your system first. Then follow the exact path below. Leave normal programs open, stop active downloads, wait ten seconds, and copy the stable numbers—not a one-second spike.

Which computer are you checking?Choose the system shown on the computer. The instructions below change automatically.
Windows: open Task Manager
  1. Press Ctrl + Shift + Esc.
  2. Open Processes. If an older Windows version shows a small window first, choose More details.
  3. Stop active downloads, wait 10 seconds, then copy the total CPU, Memory, and Disk percentages at the top. Do not click End task.
Enter both total CPU and Memory percentages to continue.
3

Check storage and startup load

These two checks find common causes of slow startup without guessing which application is “junk.” Only disable or uninstall software you recognize.

Windows locations

Free space: open File Explorer → This PC → look under Local Disk (C:). Startup: Task Manager → Startup apps → count enabled entries whose Startup impact says High.

Quick free-space guide: on a 256 GB drive, 20% is about 51 GB and 10% is about 26 GB; on a 512 GB drive, the amounts are about 102 GB and 51 GB; on a 1 TB drive, about 200 GB and 100 GB.

How much of the system drive is free?Choose a range; you do not need to calculate an exact percentage.
How many enabled startup apps are marked High impact?Use the Startup impact column. Do not disable security, audio, graphics, touchpad, backup, or work software just because it is marked High.
Select both free-space and startup answers to continue.
4

Describe what you actually notice

This changes the interpretation. A slow website, a slow browser, and a slow whole computer do not have the same likely cause.

Where is the slowdown most noticeable?Choose the closest match. This helps separate a computer problem from one app or an internet problem.
Do you see unexpected pop-ups, redirects, a changed search/home page, or unfamiliar security alerts?Do not click an alert or phone number to investigate. Just answer what you have already noticed.
Has the computer restarted, shut down, or shown a blue/black error screen unexpectedly?Normal restarts after an update do not count. Select Yes for unexpected crashes or shutdowns.
What changed shortly before the slowdown started?Timing is a clue, not proof. Select the closest answer even if you are unsure which program was involved.
Answer all four questions to continue.
Build the report only from completed evidence

Missing values stay “Not provided.” They are never counted as healthy.

Still needed:
  • finish a valid quick or deep browser check without switching tabs
  • enter the total CPU percentage
  • enter the total Memory percentage
  • select the system-drive free-space range
  • select the number of High-impact startup apps
  • select where the slowdown happens
  • answer the pop-up and browser-change question
  • answer the restart or error-screen question
  • select what changed before the slowdown
Disk may be left blank. CPU may be left blank only on systems where the instructions mark it optional.
Diagnostic result

Complete the guided check to see the conclusion

The report will put the conclusion first, distinguish measured from user-reported evidence, and leave unknown values unknown.

  • No check has run
  • No system readings entered
After the test

A useful result separates evidence from guesses.

MeterSee combines a short browser-observed sample with readings you explicitly copy from the operating system. It never turns missing data into a pass and never claims to scan installed software.

Your resultPossible causesTroubleshooting steps
High memory or red pressureCurrent applications exceed comfortable memory headroom

Close known unused apps, repeat the reading, and only consider more memory if pressure returns during normal work.

High disk activity and little free spaceUpdates, indexing, synchronization, low memory, or storage pressure

Identify sustained disk use and use built-in storage cleanup before installing any utility.

Pop-ups or changed browser settingsExtension, notification permission, unwanted application, or malicious software

Do not click the alert. Review extensions and run the operating system's built-in security scan.

Slowdown began after a new program or extensionThe recent change is a troubleshooting lead, not proof that the software is malicious

Verify its publisher, disable or remove only that known item, restart, and compare before installing a cleaner.

ChromeOS built-in memory test failsThe operating system detected a possible memory or device problem

Save important files, repeat the built-in test once, then contact the Chromebook manufacturer if it fails again.

PC slowdown screening

How this test works

Quick mode observes this tab's responsiveness and small local tasks. Optional deep mode uses bounded worker, memory-buffer, temporary browser-storage, and graphics workloads after explicit consent.

What this cannot establish

A webpage cannot enumerate all programs, scan malware, or read system-wide RAM usage. System readings are supplied by you. Compare repeat runs on the same computer; stop if it becomes uncomfortable or unstable.

Recheck before replacing hardware

Change one variable at a time, repeat under the same conditions, and compare with the operating system or the affected application. An unavailable reading is not a pass.

Measurement methodology →

Relevant fix guides