Apple: Sorry we’ve killed off all applications older than 3 years old. Microsoft:pic.twitter.com/XB7uodp2Z2
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At that time, Microsoft didn't treat GRP files as unsafe, so IE provided minimal warning before opening them. Chrome, at that time, provided zero warning before opening them. Just a single click was all that was needed.
@scarybeasts helpfully added it to the blacklist in Chrome.
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