Affected extensions

The table below shows which of the property handlers installed on a fairly typical Windows 10 and Office system can be extended by the File Metadata property handler.

Extension	Add Handler	Installed Handler
.3fr	Ok	IPropertyStore Handler for Images
.3g2	Blocked	MF MPEG-4 Property Handler
.3gp	Blocked	MF MPEG-4 Property Handler
.3gp2	Blocked	MF MPEG-4 Property Handler
.3gpp	Blocked	MF MPEG-4 Property Handler
.aac	Blocked	MF ADTS Property Handler
.ac3	Blocked	MF AC3 Property Handler
.accdt	Ok	Microsoft Access Metadata Handler
.accountpicture-ms	Ok	Packed Property Storage Object
.adts	Blocked	MF ADTS Property Handler
.appref-ms	Ok	ShellLink for Application References
.ari	Ok	IPropertyStore Handler for Images
.arw	Ok	C:\System32\WindowsCodecsRaw
.asf	Blocked	MF ASF Property Handler
.avci	Ok	IPropertyStore Handler for Images
.avcs	Ok	IPropertyStore Handler for Images
.avi	Blocked	MF AVI Property Handler
.avif	Ok	IPropertyStore Handler for Images
.avifs	Ok	IPropertyStore Handler for Images
.bay	Ok	IPropertyStore Handler for Images
.bmp	Ok	IPropertyStore Handler for Images
.cap	Ok	IPropertyStore Handler for Images
.cpl	Ok	Windows Shell
.cr2	Ok	C:\Windows\System32\WindowsCodecsRaw
.cr3	Ok	IPropertyStore Handler for Images
.crw	Ok	C:\Windows\System32\WindowsCodecsRaw
.dcr	Ok	IPropertyStore Handler for Images
.dcs	Ok	IPropertyStore Handler for Images
.dds	Ok	IPropertyStore Handler for Images
.dib	Ok	IPropertyStore Handler for Images
.dll	Ok	Windows Shell
.dng	Ok	IPropertyStore Handler for Images
.doc	Ok	Office Document Property Handler
.docm	Ok	Microsoft Word Metadata Handler
.docx	Ok	Microsoft Word Metadata Handler
.dot	Ok	Office Document Property Handler
.dotm	Ok	Microsoft Word Metadata Handler
.dotx	Ok	Microsoft Word Metadata Handler
.drf	Ok	IPropertyStore Handler for Images
.dvr-ms	Blocked	MF ASF Property Handler
.dwfx	Ok	Microsoft XPS Shell Metadata Handler
.easmx	Ok	Microsoft XPS Shell Metadata Handler
.ec3	Blocked	MF AC3 Property Handler
.edrwx	Ok	Microsoft XPS Shell Metadata Handler
.eip	Ok	IPropertyStore Handler for Images
.eml	Ok	Shell Message Handler
.eprtx	Ok	Microsoft XPS Shell Metadata Handler
.erf	Ok	C:\Windows\System32\WindowsCodecsRaw
.exe	Ok	Windows Shell
.fake	Ok	MF ASF Property Handler
.fff	Ok	IPropertyStore Handler for Images
.flac	Blocked	MF FLAC Media Property Handler
.flv	Blocked	{0BC89361-F8E4-459F-9024-3EE43D942676}
.fon	Ok	Windows Shell
.gif	Ok	IPropertyStore Handler for Images
.heic	Ok	IPropertyStore Handler for Images
.heics	Ok	IPropertyStore Handler for Images
.heif	Ok	IPropertyStore Handler for Images
.heifs	Ok	IPropertyStore Handler for Images
.ico	Ok	IPropertyStore Handler for Images
.iiq	Ok	IPropertyStore Handler for Images
.jfif	Ok	IPropertyStore Handler for Images
.jpe	Ok	IPropertyStore Handler for Images
.jpeg	Ok	IPropertyStore Handler for Images
.jpg	Ok	IPropertyStore Handler for Images
.jtx	Ok	Microsoft XPS Shell Metadata Handler
.jxr	Ok	IPropertyStore Handler for Images
.k25	Ok	IPropertyStore Handler for Images
.kdc	Ok	C:\Windows\System32\WindowsCodecsRaw
.label	Ok	Property Labels
.lnk	Ok	Shortcut
.m1v	Blocked	MF MPEG Property Handler
.m2t	Blocked	MF MPEG Property Handler
.m2ts	Blocked	MF MPEG Property Handler
.m2v	Blocked	MF MPEG Property Handler
.m4a	Blocked	MF MPEG-4 Property Handler
.m4b	Blocked	MF MPEG-4 Property Handler
.m4p	Blocked	MF MPEG-4 Property Handler
.m4v	Blocked	MF MPEG-4 Property Handler
.mef	Ok	IPropertyStore Handler for Images
.mka	Blocked	MF MKV Property Handler
.mkv	Blocked	MF MKV Property Handler
.mlapp	Ok	MathWorks Property Handler
.mlappinstall	Ok	MathWorks Property Handler
.mldatx	Ok	MathWorks Property Handler
.mltbx	Ok	MathWorks Property Handler
.mlx	Ok	MathWorks Property Handler
.mod	Blocked	MF MPEG Property Handler
.mos	Ok	IPropertyStore Handler for Images
.mov	Blocked	MF MPEG-4 Property Handler
.mp2	Blocked	MF MPEG Property Handler
.mp2v	Blocked	MF MPEG Property Handler
.mp3	Blocked	MF MP3 Property Handler
.mp4	Blocked	MF MPEG-4 Property Handler
.mp4v	Blocked	MF MPEG-4 Property Handler
.mpa	Blocked	MF MP3 Property Handler
.mpe	Blocked	MF MPEG Property Handler
.mpeg	Blocked	MF MPEG Property Handler
.mpg	Blocked	MF MPEG Property Handler
.mpv2	Blocked	MF MPEG Property Handler
.mrw	Ok	C:\Windows\System32\WindowsCodecsRaw
.msg	Ok	Office Document Property Handler
.msi	Ok	OLE DocFile Property Handler
.msp	Ok	OLE DocFile Property Handler
.mts	Blocked	MF MPEG Property Handler
.nef	Ok	C:\Windows\System32\WindowsCodecsRaw
.nrw	Ok	C:\Windows\System32\WindowsCodecsRaw
.ocx	Ok	Windows Shell
.oga	Blocked	MF Media Source Pack Property Handler
.ogg	Blocked	MF Media Source Pack Property Handler
.ogm	Blocked	MF Media Source Pack Property Handler
.ogv	Blocked	MF Media Source Pack Property Handler
.ogx	Blocked	MF Media Source Pack Property Handler
.opus	Blocked	MF Media Source Pack Property Handler
.orf	Ok	C:\Windows\System32\WindowsCodecsRaw
.ori	Ok	IPropertyStore Handler for Images
.otf	Ok	Windows Shell
.oxps	Ok	Microsoft XPS Shell Metadata Handler
.pano	Exception	Microsoft XPS Shell Metadata Handler
.pef	Ok	C:\Windows\System32\WindowsCodecsRaw
.png	Ok	IPropertyStore Handler for Images
.pot	Ok	Office Document Property Handler
.potm	Ok	Microsoft PowerPoint Metadata Handler
.potx	Ok	Microsoft PowerPoint Metadata Handler
.ppam	Ok	Microsoft PowerPoint Metadata Handler
.ppsm	Ok	Microsoft PowerPoint Metadata Handler
.ppsx	Ok	Microsoft PowerPoint Metadata Handler
.ppt	Ok	Office Document Property Handler
.pptm	Ok	Microsoft PowerPoint Metadata Handler
.pptx	Ok	Microsoft PowerPoint Metadata Handler
.ptx	Ok	IPropertyStore Handler for Images
.pxn	Ok	IPropertyStore Handler for Images
.raf	Ok	C:\Windows\System32\WindowsCodecsRaw
.raw	Ok	C:\Windows\System32\WindowsCodecsRaw
.rle	Ok	IPropertyStore Handler for Images
.rll	Ok	Windows Shell
.rw2	Ok	C:\Windows\System32\WindowsCodecsRaw
.rwl	Ok	C:\Windows\System32\WindowsCodecsRaw
.search-ms	Ok	CLSID_AutoListPropertyStore
.sr2	Ok	C:\Windows\System32\WindowsCodecsRaw
.srf	Ok	IPropertyStore Handler for Images
.srw	Ok	C:\Windows\System32\WindowsCodecsRaw
.sys	Ok	Windows Shell
.thmx	Ok	Microsoft PowerPoint Metadata Handler
.tif	Ok	IPropertyStore Handler for Images
.tiff	Ok	IPropertyStore Handler for Images
.tod	Blocked	MF MPEG Property Handler
.ts	Blocked	MF MPEG Property Handler
.ttc	Ok	Windows Shell
.ttf	Ok	Windows Shell
.tts	Blocked	MF MPEG Property Handler
.URL	Ok	Internet Shortcut
.uvu	Blocked	MF MPEG-4 Property Handler
.vob	Blocked	MF MPEG Property Handler
.vsdm	Ok	Microsoft Visio Metadata Handler
.vsdx	Ok	Microsoft Visio Metadata Handler
.vssm	Ok	Microsoft Visio Metadata Handler
.vssx	Ok	Microsoft Visio Metadata Handler
.vstm	Ok	Microsoft Visio Metadata Handler
.vstx	Ok	Microsoft Visio Metadata Handler
.wav	Blocked	MF WAV Property Handler
.wdp	Ok	IPropertyStore Handler for Images
.weba	Blocked	MF MKV Property Handler
.webm	Blocked	MF MKV Property Handler
.webp	Ok	IPropertyStore Handler for Images
.wma	Blocked	MF ASF Property Handler
.wmv	Blocked	MF ASF Property Handler
.WTV	Ok	WTVFile Property Handler
.x3f	Ok	IPropertyStore Handler for Images
.xlam	Ok	Microsoft Excel Metadata Handler
.xls	Ok	Office Document Property Handler
.xlsb	Ok	Microsoft Excel Metadata Handler
.xlsm	Ok	Microsoft Excel Metadata Handler
.xlsx	Ok	Microsoft Excel Metadata Handler
.xlt	Ok	Office Document Property Handler
.xltm	Ok	Microsoft Excel Metadata Handler
.xltx	Ok	Microsoft Excel Metadata Handler
.xps	Ok	Microsoft XPS Shell Metadata Handler