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
Browser privacy settings blocking hardware tests?
Learn why a browser may hide device details or block permissions, how to check Browser Info, and what to change before blaming your hardware.
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Tests
How to check a PC after a power outage
Check your PC safely after a power outage, spot hardware or startup problems, and decide what to back up, troubleshoot, or repair next.
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Tests
How to verify a browser-only VPN extension is working
Check whether a VPN browser extension changes your browser's public IP and exposes your real address through WebRTC or IPv6, then troubleshoot gaps.
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Tests
Page falls back to software rendering: what to check
Find out whether one page or your whole browser is using software rendering, check the GPU path, and fix common browser, driver, or display issues.
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Tests
Fixed dot on screen: overlay or stuck pixel?
A dot that stays in one place may come from an app, monitor setting, or damaged pixel. Check its source before trying a fix, and learn what the result means.
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Tests
Why microphone levels change after rebooting
Find out whether a reboot changed your microphone, its settings, or an app's input level. Compare the same test and restore a consistent level.
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Tests
What download speed means for large online courses
Learn how download speed affects course videos and large lesson files, estimate wait times, and find out whether Wi-Fi or the course site is slowing things down.
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Tests
Why does my monitor appear twice in system settings?
Find out why Windows or macOS lists a monitor twice, check whether the extra entry is real or virtual, and remove it safely.
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Tests
Why your VPN hides IPv4 but exposes IPv6
Learn why a VPN can hide your IPv4 address but expose IPv6, how to test for a leak, and which settings can stop traffic bypassing the tunnel.
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Tests
Battery drain jumps after connecting a USB drive
Find out whether the USB drive itself or activity it triggers is draining your laptop, and compare battery use with a simple before-and-after test.
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Tests
What to test after connecting new peripherals
Check that new keyboards, mice, cameras, speakers, screens, and drives work together, then use a browser-based check to isolate any problems.
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Tests
How to spot backlight bleed on a laptop screen
Learn how to check for backlight bleed on a laptop screen, separate it from normal IPS glow, and decide whether a setting or repair is needed.