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Windows 8 & 10 bug
Sometimes my computer uses 100% of the HDD [ctrl+Shift+Esc to see what % is being used]. When this happens my whole computer slows down. I discovered there is some bugs in windows 8 and 10 that cause this -
http://www.makeuseof.com/tag/4-tips-fix-100-disk-usage-improve-windows-performance/
http://www.makeuseof.com/tag/4-tips-fix-100-disk-usage-improve-windows-performance/