Not defterine:
Windows Registry Editor Version 5.00
[HKEY_USERS\S-1-5-21-3599307510-3234851423-4053249024-1000\Software\Microsoft\Internet Explorer\Desktop\General]
"TileWallpaper"="0"
"WallpaperStyle"="0"
"Wallpaper"=hex(2):25,00,41,00,50,00,50,00,44,00,41,00,54,00,41,00,25,00,5c,00, 4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e, 00,64,00,6f,00,77,00,73,00,20,00,50,00,68,00,6f,00,74,00,6f,00,20,00,47,00, 61,00,6c,00,6c,00,65,00,72,00,79,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77, 00,73,00,20,00,46,00,6f,00,74,00,6f,00,1f,01,72,00,61,00,66,00,20,00,47,00, 61,00,6c,00,65,00,72,00,69,00,73,00,69,00,20,00,44,00,75,00,76,00,61,00,72, 00,20,00,4b,00,61,00,1f,01,31,01,64,00,31,01,2e,00,6a,00,70,00,67,00,00,00
"BackupWallpaper"=hex(2):25,00,41,00,50,00,50,00,44,00,41,00,54,00,41,00,25,00, 5c,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,74,00,5c,00,57,00,69, 00,6e,00,64,00,6f,00,77,00,73,00,20,00,50,00,68,00,6f,00,74,00,6f,00,20,00, 47,00,61,00,6c,00,6c,00,65,00,72,00,79,00,5c,00,57,00,69,00,6e,00,64,00,6f, 00,77,00,73,00,20,00,46,00,6f,00,74,00,6f,00,1f,01,72,00,61,00,66,00,20,00, 47,00,61,00,6c,00,65,00,72,00,69,00,73,00,69,00,20,00,44,00,75,00,76,00,61, 00,72,00,20,00,4b,00,61,00,1f,01,31,01,64,00,31,01,2e,00,6a,00,70,00,67,00, 00,00
"WallpaperFileTime"=hex:65,92,76,f0,29,37,ca,01
"WallpaperLocalFileTime"=hex:65,ca,c3,15,43,37,ca,01
yapıştırıp farklı kaydet ile uzantısını reg yapın, çift tık evet tamam diyin. Çözülmezse biraz daha bakayım, kendim buldum bu girdiyi.