Ask Microsoft. All Time::HiRes is doing is providing an interface with the system libraries. If the system doesn't provide time with a resolution more than 1/1000th of a second, neither can Time::HiRes. If the system uses a different interface than Time::HiRes is using, Time::HiRes won't know.

See the manual page of Time::HiRes, which system functions Time::HiRes is trying to use, and see your system manuals to see which one they provide.

Abigail