joshuago’s windows Bookmarks

If you look at the disassembly of functions inside Windows DLLs, you'll find that they begin with the seemingly pointless instruction MOV EDI, EDI. This instruction copies a register to itself and updates no flags; it is completely meaningless. So why is it there? It's a hot-patch point.

Even when you are careful about what you install it seems that each day it takes longer for it to boot. It’s not your imagination – and there are a couple of good tips to keep your boot time short and sweet.