PC.net

.prx

File Type 1 Generic IconWindows Media Profile File
File Format Proprietary (Microsoft)
Usage Referenced by an application; not meant to be opened manually
Rank ★ ★ ★  Common
Description

XML file that contains a user or language profile; referenced by Windows Media Player and Windows Media Encoder; supported by Windows Media Player 9 and later.

Open With
Windows

IconMicrosoft Windows Media Player

IconMicrosoft Windows Live Movie Maker

Updated June 17, 2009
File Type 2 Generic IconPSP Plugin File
File Format Proprietary (Sony)
Usage Open manually
Rank ★ ☆ ☆  Uncommon
Description

Data file used for updating the firmware of the PlayStation Portable (PSP); can upgrade custom firmware and may be included with firmware dumps; often used to add extra features such enabling screen captures and adding Flash support to the Web browser.

Open With
Windows

IconAceHack PRX Installer

IconWeeJeWel's PRX Manager

Updated 2007
Information from the PC File Extensions Reference
https://pc.net/extensions/file/prx
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