UAC Virtualization


Mark Blain

I run a number of 32-bit programs that do heavy disk I-O.
When I right-click them in Task Manager "UAC Virtualization" is enabled,
meaning that any writes to protected disk or registry locations will be
redirected. Even well-behaved, Win7-aware programs like 32-bit
IEXPLORE.EXE show this checkmark (64-bit IEXPLORE.EXE does not).

Does UAC Virtualization cause a performance hit in my disk I-O, as Windows
checks every file write for "prohibited" behavior? Would my disk-
intensive programs run faster if it were disabled temporarily?


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