Blog
Tests
Guides for testing your keyboard, mouse, screen, sound, network and other hardware, and for fixing what the tests find.
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Tests
Cross-shaped mark on screen: what it means
A fixed cross on your screen may be a stuck pixel cluster, an overlay, or panel damage. Learn how to identify it and what to try next.
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Tests
Mouse buttons stop responding when the battery is low
Find out whether low power is interrupting your wireless mouse, how to test its buttons, and what to check before replacing the mouse.
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Tests
Why video playback affects CPU test results
See why video playing in another tab can change your Processor Test score, how to retest under fair conditions, and which system settings to check.
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Tests
Computer fan surges every few seconds: what to check
Find out whether repeated fan bursts come from normal workload changes, blocked airflow, or a cooling problem, then test safely and choose the next check.
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Tests
Display scaling changes reported screen dimensions
Learn why changing display scaling can alter screen dimensions reported by a browser, and how to compare the reported size with your display settings.
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Tests
Why a VPN test cannot prove complete online anonymity
A VPN leak test checks a few exposed network details, not anonymity. Learn what its result proves, what it misses, and what to check next.
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Tests
How to find your browser's reported platform information
See what operating system and platform your browser reports, how to check it with Browser Info, and why the result may not match your device.
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Tests
Why file saving works in one browser but not another
Find out why a file saves in one browser but not another, compare browser settings and site permissions, and fix common download or export problems.
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Tests
Why browser memory test scores keep changing
Learn why browser memory test scores change between runs, what read, write, copy and response-time results mean, and how to compare them fairly.
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Tests
Why a fast microSD card crawls in a cheap reader
A fast microSD card can be limited by its reader, port, or adapter. Test read and write speed, then find the bottleneck without risking your files.
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Tests
Why wireless roaming causes short interruptions
Learn why Wi-Fi drops for a few seconds as you move between access points, how to test for roaming interruptions, and what settings may help.
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Tests
What a WebRTC candidate means in a leak report
Learn what host, server-reflexive, and relay candidates mean in a WebRTC leak report, and how to tell whether your VPN is exposing your IP.