Download this check first
This page is open from a website, so it can’t test your computer. Download it, open the downloaded file in the browser you’ll use for the kit, and run it there.
Open this on your computer
You’re on a phone or tablet. Open this check on the computer you’ll use the kit on.
Copy the file to your computer, then open it there in Chrome, Edge, Safari or Firefox.
Check your computer
About 1 minute, in the browser you’ll use for the kit. Nothing is sent anywhere.
- Scripts
- Saving in the browser
- Downloading files
- Opening filesPick the test file you downloaded
- Pop-up windowsOpen, then close with Esc
- Printing and PDFOpen preview, then cancel
On a work computer?
Work-managed laptops often block a few things the kit needs. Find yours below.
The kit download or ZIP won’t open
How to spot it: the download is marked “blocked”, or the ZIP won’t unzip.
Try: choose Keep in the browser’s download list. Right-click the ZIP and choose Extract All (Windows) or double-click it (Mac). If that’s blocked, ask IT.
Files on your computer won’t open in the browser
How to spot it: the page is blank, says “blocked by your organization”, or the Scripts check fails.
Try: open the file in another browser your company approves. If none work, ask IT to allow local HTML files.
Your work disappears between visits
How to spot it: the Saving in the browser check fails, or saved progress is gone the next day.
Try: use a normal (not private) window. Save a work file from the kit before closing, because some companies clear browser data when you sign out.
The kit folder is in a synced or temporary folder
How to spot it: files open from inside the ZIP, OneDrive, or a Temp folder, or links between pages break.
Try: unzip the whole folder into Documents, then open START-HERE.html from there.
Browser settings are managed by your company
How to spot it: the settings show “Managed by your organization”.
Try: you can’t change these yourself. Send IT the note below.
Note to send your IT team
Still stuck?
Copy your results and send them to Extrasphere support.