Below the bolded text is a plain text of my ini that you can copy without downloading.
At the bottom is a section about sD3DDevice= you need to add whatever your GPU* is to that line as formatted in your current SkyrimPrefs.ini file.
*Including integrated GPUs like "Intel HD Graphics 630"

[Display]
fShadowDistance=3000.0000
iNumFocusShadow=1
fInteriorShadowDistance=3000.0000
ffocusShadowMapDoubleEveryXUnit=450.0000
iShadowMapResolution=1024
fDynamicDOFBlurMultiplier=0.7500
fProjectedUVNormalDetailTilingScale=0.8000
fProjectedUVDiffuseNormalTilingScale=0.2000
bEnableProjecteUVDiffuseNormals=0
bUseTAA=0
bIndEnable=0
bSAO_CS_Enable=0
bToggleSparkles=0
bSAOEnable=1
bScreenSpaceReflectionEnabled=0
bIBLFEnable=0
bUse64bitsHDRRenderTarget=0
iSaveGameScreenShotHeighWSt=192
iSaveGameScreenShotWidthWS=320
iSaveGameScreenShotHeight=192
iSaveGameScreenShotWidth=256
iShadowMaskQuarter=4
bVolumetricLightingEnable=0
iVolumetricLightingQuality=0
bEnableImprovedSnow=0
fLightLODStartFade=3500.0000
bFXAAEnabled=1
fLeafAnimDampenDistEnd=4600.0000
fLeafAnimDampenDistStart=3600.0000
fTreesMidLODSwitchDist=9999999.0000
fMeshLODFadePercentDefault=1.2000
fMeshLODFadeBoundDefault=256.0000
fMeshLODLevel2FadeTreeDistance=2048.0000
fMeshLODLevel1FadeTreeDistance=2844.0000
fMeshLODLevel2FadeDist=1600.0000
fMeshLODLevel1FadeDist=4000.0000
fGamma=1.0000
bBorderless=1
bFull Screen=1
iSize H=1200
iSize W=1920
iScreenShotIndex=0
bTreesReceiveShadows=1
bUsePrecipitationOcclusion=0
bDrawLandShadows=0
iMaxSkinDecalsPerFrame=150
iMaxDecalsPerFrame=500
iAdapter=0
iNumSplits=2
uBookRatio=2
bForceCreateTarget=0
iReflectionResolutionDivider=2
iVSyncPresentInterval=1
[Imagespace]
bDoDepthOfField=1
bLensFlare=0
[General]
fLightingOutputColourClampPostSpec=1.0000
fLightingOutputColourClampPostEnv=1.0000
fLightingOutputColourClampPostLit=1.0000
iStoryManagerLoggingEvent=-1
bEnableStoryManagerLogging=0
uLargeRefLODGridSize=5
bFreebiesSeen=0
[MAIN]
fSkyCellRefFadeDistance=150000.0000
bGamepadEnable=0
bCrosshairEnabled=1
fHUDOpacity=1.0000
bSaveOnPause=0
bSaveOnTravel=0
bSaveOnWait=0
bSaveOnRest=1
[Interface]
fMouseCursorSpeed=1.0000
bDialogueSubtitles=0
bGeneralSubtitles=0
bShowCompass=1
[GamePlay]
bShowFloatingQuestMarkers=1
bShowQuestMarkers=1
iDifficulty=2
[Controls]
fMouseHeadingSensitivity=0.0125
fGamepadHeadingSensitivity=0.6667
bAlwaysRunByDefault=1
bInvertYValues=0
bGamePadRumble=1
bUseKinect=0
[Particles]
iMaxDesired=750
[SaveGame]
fAutosaveEveryXMins=15.0000
[AudioMenu]
fAudioMasterVolume=1.0000
fVal7=1.0000
uID7=0
fVal6=1.0000
uID6=0
fVal5=1.0000
uID5=0
fVal4=1.0000
uID4=151039367
fVal3=0.5000
uID3=466532
fVal2=0.8000
uID2=554685
fVal1=0.8000
uID1=1007612
fVal0=1.0000
uID0=94881
[Clouds]
fCloudLevel2Distance=262144.0000
fCloudLevel1Distance=32768.0000
fCloudLevel0Distance=16384.0000
fCloudNearFadeDistance=9000.0000
[Water]
bUseWaterDisplacements=1
bUseWaterRefractions=1
bUseWaterReflections=1
bUseWaterDepth=1
[TerrainManager]
fTreeLoadDistance=12500.0000
fBlockMaximumDistance=100000.0000
fBlockLevel1Distance=25000.0000
fBlockLevel0Distance=15000.0000
fSplitDistanceMult=0.5000
bShowLODInEditor=1
[NavMesh]
fObstacleAlpha=0.5000
fCoverSideHighAlpha=0.8000
fCoverSideLowAlpha=0.6500
fEdgeFullAlpha=1.0000
fEdgeHighAlpha=0.7500
fEdgeLowAlpha=0.5000
fTriangleFullAlpha=0.7000
fTriangleHighAlpha=0.3500
fTriangleLowAlpha=0.2000
fLedgeBoxHalfHeight=25.0000
fEdgeDistFromVert=10.0000
fEdgeThickness=10.0000
fPointSize=2.5000
[Trees]
bRenderSkinnedTrees=1
uiMaxSkinnedTreesToRender=40
[Grass]
fGrassStartFadeDistance=1000.0000
fGrassMaxStartFadeDistance=7000.0000
fGrassMinStartFadeDistance=0.0000
[Decals]
bSkinnedDecals=1
bDecals=1
uMaxSkinDecals=0
uMaxDecals=0
iMaxDecalsPerFrame=0
iMaxSkinDecalsPerFrame=0
[LOD]
fLODFadeOutMultSkyCell=1.0000
fLODFadeOutMultObjects=5.0000
fLODFadeOutMultItems=1.5000
fLODFadeOutMultActors=5.0000
[Launcher]
sD3DDevice=
uLastAspectRatio=2
[Bethesda.net]
uPersistentUuidData3=1054400073
uPersistentUuidData2=2682852977
uPersistentUuidData1=1547716538
uPersistentUuidData0=1235626590