I've been getting this for a couple of days now
New: StressMyPC (Dec 10, 2025), Platform 30.1.3 (Nov 17, 2025)
1,400+ portable packages, 1.2 billion downloads
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December 2025 Site Slowdown Being Addressed
This was fixed yesterday. I just installed it without issue via the platform.
https://portableapps.com/comment/257718#comment-257718
Please try it again now. If it fails, please try clearing your Windows internet cache. Click Start, type internet options, select it, then click the Delete button.
Sometimes, the impossible can become possible, if you're awesome!