This question was posed to Community and after some time they directed me to this community
windows 10 pro 64 bit
https://answers.microsoft.com/en-us/windows/forum/windows_10-performance/windows-10-64-bit-1809-net-framework-not-working/b8afc85d-21ac-4403-aca5-164e54c9625c?messageId=06302479-6bc6-4b81-9105-d31d7e2751a9
Net frame work 4 seems not installed correctly
Tried with repair tool failed
tried to install 4 downloading from microsoft.Returned with" .net framework 4.7 or later is already installed on this computer"
Tried enable thru windows feature turned of or on no success
Checked the registry .net framework 2.0 & 3.5 found under Net framework setup - NDP
Request some early solution to this annoying problem.thanks