To delete a sub key or value, right-click the item and select Delete. Editing the Registry to Speed up Windows Now that you know how to edit the Windows Registry, let's examine a handful of Registry tweaks that can speed up Windows performance on your PC. Jason says:. That's because Registry settings often aren't deleted when you remove a program from your PC; this contributes to Registry "bloat" with lots of unnecessary or orphaned entries. Tchiase Blog says:.
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