.Net Framework 4.8 not working and v4 not showing on regedit

I was trying to install Se browser but it showed an error about net framework with code 0x80070643.I did download the net fw 4.8 and tried to repair but it didnt work. When i checked regedit i couldnt find directory named v4, there was only v2,v3 and v3.5. (I checked HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP) I realized that i am also unable to launch microsoft store. Any help would be much appreciated.