Manually set your Pagefile to at least (16000–32000 MB) on your fastest drive (preferably an SSD).
A lesser-known but highly effective fix is . Many FitGirl repacks include a “Limit installer to 2GB of RAM” checkbox. Enabling this forces the decompressor to use smaller chunks, which can circumvent errors caused by borderline-unstable high-frequency memory.
In plain English: The installer tried to unpack a chunk of data, but the data that arrived did not match what the original file was supposed to look like. Windows suspects or permission failure .