Can they? I continue receiving these corrupted filea errors when running SFC scan even without applying any updates. I fix them with DISM Health Recovery but then a few days later I run SFC scan again and once again some files are corrupted and need DISM Health Restore to fix... I have Win 8.1 on SSD and I know defragmentation on SSDs does very little, but it does help somewhat. I do it once a week on my small Windows-only partition, so drive health is not a big concern for me. Please no comments regarding defragging SSDs is stupid. Could SSD defrag mess with and create these SFC errors???