I was interested in changing the default font on my Windows 10 devices, and so I followed some instructions I found here. Upon restarting my computer, I realized that the font I chose would not work and I would now like to revert everything back to how it was before.

I edited, as per the link above's instructions, in:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts

Most of the Segoe UI <somevariant> fonts to simply be empty, and then in:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes

I changed the Segoe UI key to my desired font (which was Open Sans).

So, how would I revert these changes? I'm guessing that I should revert these values back to their defaults, but I don't know what those defaults are. Any help would be appreciated.


Registry entries Copied from Windows 10 1909 Build 18363.836

Here are the default registry entries for both locations you gave, copy the text in between the *** to a text file, then save it, now change the txt file extension to .reg, once that is done right click and select Merge. There are 2 of these below you need to make.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts]

"Arial (TrueType)"="arial.ttf"

"Arial Black (TrueType)"="ariblk.ttf"

"Arial Bold (TrueType)"="arialbd.ttf"

"Arial Bold Italic (TrueType)"="arialbi.ttf"

"Arial Italic (TrueType)"="ariali.ttf"

"Bahnschrift (TrueType)"="bahnschrift.ttf"

"Calibri (TrueType)"="calibri.ttf"

"Calibri Bold (TrueType)"="calibrib.ttf"

"Calibri Bold Italic (TrueType)"="calibriz.ttf"

"Calibri Italic (TrueType)"="calibrii.ttf"

"Calibri Light (TrueType)"="calibril.ttf"

"Calibri Light Italic (TrueType)"="calibrili.ttf"

"Cambria & Cambria Math (TrueType)"="cambria.ttc"

"Cambria Bold (TrueType)"="cambriab.ttf"

"Cambria Bold Italic (TrueType)"="cambriaz.ttf"

"Cambria Italic (TrueType)"="cambriai.ttf"

"Candara (TrueType)"="candara.ttf"

"Candara Bold (TrueType)"="candarab.ttf"

"Candara Bold Italic (TrueType)"="candaraz.ttf"

"Candara Italic (TrueType)"="candarai.ttf"

"Candara Light (TrueType)"="candaral.ttf"

"Candara Light Italic (TrueType)"="candarali.ttf"

"Comic Sans MS (TrueType)"="comic.ttf"

"Comic Sans MS Bold (TrueType)"="comicbd.ttf"

"Comic Sans MS Bold Italic (TrueType)"="comicz.ttf"

"Comic Sans MS Italic (TrueType)"="comici.ttf"

"Consolas (TrueType)"="consola.ttf"

"Consolas Bold (TrueType)"="consolab.ttf"

"Consolas Bold Italic (TrueType)"="consolaz.ttf"

"Consolas Italic (TrueType)"="consolai.ttf"

"Constantia (TrueType)"="constan.ttf"

"Constantia Bold (TrueType)"="constanb.ttf"

"Constantia Bold Italic (TrueType)"="constanz.ttf"

"Constantia Italic (TrueType)"="constani.ttf"

"Corbel (TrueType)"="corbel.ttf"

"Corbel Bold (TrueType)"="corbelb.ttf"

"Corbel Bold Italic (TrueType)"="corbelz.ttf"

"Corbel Italic (TrueType)"="corbeli.ttf"

"Corbel Light (TrueType)"="corbell.ttf"

"Corbel Light Italic (TrueType)"="corbelli.ttf"

"Courier New (TrueType)"="cour.ttf"

"Courier New Bold (TrueType)"="courbd.ttf"

"Courier New Bold Italic (TrueType)"="courbi.ttf"

"Courier New Italic (TrueType)"="couri.ttf"

"Ebrima (TrueType)"="ebrima.ttf"

"Ebrima Bold (TrueType)"="ebrimabd.ttf"

"Franklin Gothic Medium (TrueType)"="framd.ttf"

"Franklin Gothic Medium Italic (TrueType)"="framdit.ttf"

"Gabriola (TrueType)"="Gabriola.ttf"

"Gadugi (TrueType)"="gadugi.ttf"

"Gadugi Bold (TrueType)"="gadugib.ttf"

"Georgia (TrueType)"="georgia.ttf"

"Georgia Bold (TrueType)"="georgiab.ttf"

"Georgia Bold Italic (TrueType)"="georgiaz.ttf"

"Georgia Italic (TrueType)"="georgiai.ttf"

"Impact (TrueType)"="impact.ttf"

"Ink Free (TrueType)"="Inkfree.ttf"

"Javanese Text (TrueType)"="javatext.ttf"

"Leelawadee UI (TrueType)"="leelawui.ttf"

"Leelawadee UI Bold (TrueType)"="leelauib.ttf"

"Leelawadee UI Semilight (TrueType)"="leeluisl.ttf"

"Lucida Console (TrueType)"="lucon.TTF"

"Lucida Sans Unicode (TrueType)"="l_10646.ttf"

"Malgun Gothic (TrueType)"="malgun.ttf"

"Malgun Gothic Bold (TrueType)"="malgunbd.ttf"

"Malgun Gothic SemiLight (TrueType)"="malgunsl.ttf"

"Microsoft Himalaya (TrueType)"="himalaya.ttf"

"Microsoft JhengHei & Microsoft JhengHei UI (TrueType)"="msjh.ttc"

"Microsoft JhengHei Bold & Microsoft JhengHei UI Bold (TrueType)"="msjhbd.ttc"

"Microsoft JhengHei Light & Microsoft JhengHei UI Light (TrueType)"="msjhl.ttc"

"Microsoft New Tai Lue (TrueType)"="ntailu.ttf"

"Microsoft New Tai Lue Bold (TrueType)"="ntailub.ttf"

"Microsoft PhagsPa (TrueType)"="phagspa.ttf"

"Microsoft PhagsPa Bold (TrueType)"="phagspab.ttf"

"Microsoft Sans Serif (TrueType)"="micross.ttf"

"Microsoft Tai Le (TrueType)"="taile.ttf"

"Microsoft Tai Le Bold (TrueType)"="taileb.ttf"

"Microsoft YaHei & Microsoft YaHei UI (TrueType)"="msyh.ttc"

"Microsoft YaHei Bold & Microsoft YaHei UI Bold (TrueType)"="msyhbd.ttc"

"Microsoft YaHei Light & Microsoft YaHei UI Light (TrueType)"="msyhl.ttc"

"Microsoft Yi Baiti (TrueType)"="msyi.ttf"

"MingLiU-ExtB & PMingLiU-ExtB & MingLiU_HKSCS-ExtB (TrueType)"="mingliub.ttc"

"Modern (All res)"="modern.fon"

"Mongolian Baiti (TrueType)"="monbaiti.ttf"

"MS Gothic & MS UI Gothic & MS PGothic (TrueType)"="msgothic.ttc"

"MV Boli (TrueType)"="mvboli.ttf"

"Myanmar Text (TrueType)"="mmrtext.ttf"

"Myanmar Text Bold (TrueType)"="mmrtextb.ttf"

"Nirmala UI (TrueType)"="Nirmala.ttf"

"Nirmala UI Bold (TrueType)"="NirmalaB.ttf"

"Nirmala UI Semilight (TrueType)"="NirmalaS.ttf"

"Palatino Linotype (TrueType)"="pala.ttf"

"Palatino Linotype Bold (TrueType)"="palab.ttf"

"Palatino Linotype Bold Italic (TrueType)"="palabi.ttf"

"Palatino Linotype Italic (TrueType)"="palai.ttf"

"Roman (All res)"="roman.fon"

"Script (All res)"="script.fon"

"Segoe MDL2 Assets (TrueType)"="segmdl2.ttf"

"Segoe Print (TrueType)"="segoepr.ttf"

"Segoe Print Bold (TrueType)"="segoeprb.ttf"

"Segoe Script (TrueType)"="segoesc.ttf"

"Segoe Script Bold (TrueType)"="segoescb.ttf"

"Segoe UI (TrueType)"="segoeui.ttf"

"Segoe UI Black (TrueType)"="seguibl.ttf"

"Segoe UI Black Italic (TrueType)"="seguibli.ttf"

"Segoe UI Bold (TrueType)"="segoeuib.ttf"

"Segoe UI Bold Italic (TrueType)"="segoeuiz.ttf"

"Segoe UI Emoji (TrueType)"="seguiemj.ttf"

"Segoe UI Historic (TrueType)"="seguihis.ttf"

"Segoe UI Italic (TrueType)"="segoeuii.ttf"

"Segoe UI Light (TrueType)"="segoeuil.ttf"

"Segoe UI Light Italic (TrueType)"="seguili.ttf"

"Segoe UI Semibold (TrueType)"="seguisb.ttf"

"Segoe UI Semibold Italic (TrueType)"="seguisbi.ttf"

"Segoe UI Semilight (TrueType)"="segoeuisl.ttf"

"Segoe UI Semilight Italic (TrueType)"="seguisli.ttf"

"Segoe UI Symbol (TrueType)"="seguisym.ttf"

"SimSun & NSimSun (TrueType)"="simsun.ttc"

"SimSun-ExtB (TrueType)"="simsunb.ttf"

"Sitka Small & Sitka Text & Sitka Subheading & Sitka Heading & Sitka Display & Sitka 
Banner (TrueType)"="Sitka.ttc"

"Sitka Small Bold & Sitka Text Bold & Sitka Subheading Bold & Sitka Heading Bold & Sitka 
Display Bold & Sitka Banner Bold (TrueType)"="SitkaB.ttc"

"Sitka Small Bold Italic & Sitka Text Bold Italic & Sitka Subheading Bold Italic & Sitka 
Heading Bold Italic & Sitka Display Bold Italic & Sitka Banner Bold Italic 

"Sitka Small Italic & Sitka Text Italic & Sitka Subheading Italic & Sitka Heading Italic & 
Sitka Display Italic & Sitka Banner Italic (TrueType)"="SitkaI.ttc"

"Sylfaen (TrueType)"="sylfaen.ttf"

"Symbol (TrueType)"="symbol.ttf"

"Tahoma (TrueType)"="tahoma.ttf"

"Tahoma Bold (TrueType)"="tahomabd.ttf"

"Times New Roman (TrueType)"="times.ttf"

"Times New Roman Bold (TrueType)"="timesbd.ttf"

"Times New Roman Bold Italic (TrueType)"="timesbi.ttf"

"Times New Roman Italic (TrueType)"="timesi.ttf"

"Trebuchet MS (TrueType)"="trebuc.ttf"

"Trebuchet MS Bold (TrueType)"="trebucbd.ttf"

"Trebuchet MS Bold Italic (TrueType)"="trebucbi.ttf"

"Trebuchet MS Italic (TrueType)"="trebucit.ttf"

"Verdana (TrueType)"="verdana.ttf"

"Verdana Bold (TrueType)"="verdanab.ttf"

"Verdana Bold Italic (TrueType)"="verdanaz.ttf"

"Verdana Italic (TrueType)"="verdanai.ttf"

"Webdings (TrueType)"="webdings.ttf"

"Wingdings (TrueType)"="wingding.ttf"

"Yu Gothic Bold & Yu Gothic UI Semibold & Yu Gothic UI Bold (TrueType)"="YuGothB.ttc"

"Yu Gothic Light & Yu Gothic UI Light (TrueType)"="YuGothL.ttc"

"Yu Gothic Medium & Yu Gothic UI Regular (TrueType)"="YuGothM.ttc"

"Yu Gothic Regular & Yu Gothic UI Semilight (TrueType)"="YuGothR.ttc"

"Courier 10,12,15"="COURE.FON"

"Courier 10,12,15 (120)"="COURF.FON"

"MS Serif 8,10,12,14,18,24"="SERIFE.FON"

"MS Serif 8,10,12,14,18,24 (120)"="SERIFF.FON"

"MS Sans Serif 8,10,12,14,18,24"="SSERIFE.FON"

"MS Sans Serif 8,10,12,14,18,24 (120)"="SSERIFF.FON"

"Small Fonts"="SMALLE.FON"

"Small Fonts (120)"="SMALLF.FON"

"Holo MDL2 Assets (TrueType)"="holomdl2.ttf"

"MT Extra (TrueType)"="C:\\Program Files (x86)\\Common Files\\Microsoft Shared\\EQUATION\\MTEXTRA.TTF"

"Book Antiqua Bold (TrueType)"="ANTQUAB.TTF"

"Book Antiqua Bold Italic (TrueType)"="ANTQUABI.TTF"

"Book Antiqua Italic (TrueType)"="ANTQUAI.TTF"

"Book Antiqua (TrueType)"="BKANT.TTF"

"Century Gothic (TrueType)"="GOTHIC.TTF"

"Century Gothic Bold (TrueType)"="GOTHICB.TTF"

"Century Gothic Bold Italic (TrueType)"="GOTHICBI.TTF"

"Century Gothic Italic (TrueType)"="GOTHICI.TTF"

"Bookshelf Symbol 7 (TrueType)"="BSSYM7.TTF"

"MS Reference Sans Serif (TrueType)"="REFSAN.TTF"

"MS Reference Specialty (TrueType)"="REFSPCL.TTF"

"Freestyle Script (TrueType)"="FREESCPT.TTF"

"Juice ITC (TrueType)"="JUICE___.TTF"

"Kristen ITC (TrueType)"="ITCKRIST.TTF"

"Lucida Handwriting Italic (TrueType)"="LHANDW.TTF"

"Mistral (TrueType)"="MISTRAL.TTF"

"Tempus Sans ITC (TrueType)"="TEMPSITC.TTF"

"Garamond (TrueType)"="GARA.TTF"

"Garamond Bold (TrueType)"="GARABD.TTF"

"Garamond Italic (TrueType)"="GARAIT.TTF"

"Monotype Corsiva (TrueType)"="MTCORSVA.TTF"

"Bookman Old Style (TrueType)"="BOOKOS.TTF"

"Bookman Old Style Bold (TrueType)"="BOOKOSB.TTF"

"Bookman Old Style Bold Italic (TrueType)"="BOOKOSBI.TTF"

"Bookman Old Style Italic (TrueType)"="BOOKOSI.TTF"

"Algerian (TrueType)"="ALGER.TTF"

"Baskerville Old Face (TrueType)"="BASKVILL.TTF"

"Bauhaus 93 (TrueType)"="BAUHS93.TTF"

"Bell MT (TrueType)"="BELL.TTF"

"Bell MT Bold (TrueType)"="BELLB.TTF"

"Bell MT Italic (TrueType)"="BELLI.TTF"

"Berlin Sans FB Bold (TrueType)"="BRLNSB.TTF"

"Berlin Sans FB Demi Bold (TrueType)"="BRLNSDB.TTF"

"Berlin Sans FB (TrueType)"="BRLNSR.TTF"

"Bernard MT Condensed (TrueType)"="BERNHC.TTF"

"Bodoni MT Poster Compressed (TrueType)"="BOD_PSTC.TTF"

"Britannic Bold (TrueType)"="BRITANIC.TTF"

"Broadway (TrueType)"="BROADW.TTF"

"Brush Script MT Italic (TrueType)"="BRUSHSCI.TTF"

"Californian FB Bold (TrueType)"="CALIFB.TTF"

"Californian FB Italic (TrueType)"="CALIFI.TTF"

"Californian FB (TrueType)"="CALIFR.TTF"

"Centaur (TrueType)"="CENTAUR.TTF"

"Chiller (TrueType)"="CHILLER.TTF"

"Colonna MT (TrueType)"="COLONNA.TTF"

"Cooper Black (TrueType)"="COOPBL.TTF"

"Footlight MT Light (TrueType)"="FTLTLT.TTF"

"Harlow Solid Italic (TrueType)"="HARLOWSI.TTF"

"Harrington (TrueType)"="HARNGTON.TTF"

"High Tower Text (TrueType)"="HTOWERT.TTF"

"High Tower Text Italic (TrueType)"="HTOWERTI.TTF"

"Jokerman (TrueType)"="JOKERMAN.TTF"

"Kunstler Script (TrueType)"="KUNSTLER.TTF"

"Lucida Bright (TrueType)"="LBRITE.TTF"

"Lucida Bright Demibold (TrueType)"="LBRITED.TTF"

"Lucida Bright Demibold Italic (TrueType)"="LBRITEDI.TTF"

"Lucida Bright Italic (TrueType)"="LBRITEI.TTF"

"Lucida Calligraphy Italic (TrueType)"="LCALLIG.TTF"

"Lucida Fax Regular (TrueType)"="LFAX.TTF"

"Lucida Fax Demibold (TrueType)"="LFAXD.TTF"

"Lucida Fax Demibold Italic (TrueType)"="LFAXDI.TTF"

"Lucida Fax Italic (TrueType)"="LFAXI.TTF"

"Magneto Bold (TrueType)"="MAGNETOB.TTF"

"Matura MT Script Capitals (TrueType)"="MATURASC.TTF"

"Modern No. 20 (TrueType)"="MOD20.TTF"

"Niagara Engraved (TrueType)"="NIAGENG.TTF"

"Niagara Solid (TrueType)"="NIAGSOL.TTF"

"Old English Text MT (TrueType)"="OLDENGL.TTF"

"Onyx (TrueType)"="ONYX.TTF"

"Parchment (TrueType)"="PARCHM.TTF"

"Playbill (TrueType)"="PLAYBILL.TTF"

"Poor Richard (TrueType)"="POORICH.TTF"

"Ravie (TrueType)"="RAVIE.TTF"

"Informal Roman (TrueType)"="INFROMAN.TTF"

"Showcard Gothic (TrueType)"="SHOWG.TTF"

"Snap ITC (TrueType)"="SNAP____.TTF"

"Stencil (TrueType)"="STENCIL.TTF"

"Viner Hand ITC (TrueType)"="VINERITC.TTF"

"Vivaldi Italic (TrueType)"="VIVALDII.TTF"

"Vladimir Script (TrueType)"="VLADIMIR.TTF"

"Wide Latin (TrueType)"="LATINWD.TTF"

"Century (TrueType)"="CENTURY.TTF"

"Wingdings 2 (TrueType)"="WINGDNG2.TTF"

"Wingdings 3 (TrueType)"="WINGDNG3.TTF"

"Arial Unicode MS (TrueType)"="ARIALUNI.TTF"

"MS Mincho (TrueType)"="MSMINCHO.TTF"

"Arial Narrow (TrueType)"="ARIALN.TTF"

"Arial Narrow Bold (TrueType)"="ARIALNB.TTF"

"Arial Narrow Bold Italic (TrueType)"="ARIALNBI.TTF"

"Arial Narrow Italic (TrueType)"="ARIALNI.TTF"


Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes]

"Arabic Transparent"="Arial"

"Arabic Transparent Bold"="Arial Bold"

"Arabic Transparent Bold,0"="Arial Bold,178"

"Arabic Transparent,0"="Arial,178"

"Arial Baltic,186"="Arial,186"

"Arial CE,238"="Arial,238"

"Arial CYR,204"="Arial,204"

"Arial Greek,161"="Arial,161"

"Arial TUR,162"="Arial,162"

"Courier New Baltic,186"="Courier New,186"

"Courier New CE,238"="Courier New,238"

"Courier New CYR,204"="Courier New,204"

"Courier New Greek,161"="Courier New,161"

"Courier New TUR,162"="Courier New,162"

"Helv"="MS Sans Serif"


"MS Shell Dlg 2"="Tahoma"

"Tahoma Armenian"="Tahoma"

"Times"="Times New Roman"

"Times New Roman Baltic,186"="Times New Roman,186"

"Times New Roman CE,238"="Times New Roman,238"

"Times New Roman CYR,204"="Times New Roman,204"

"Times New Roman Greek,161"="Times New Roman,161"

"Times New Roman TUR,162"="Times New Roman,162"

"Tms Rmn"="MS Serif"

"MS Shell Dlg"="Microsoft Sans Serif"

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