it is possible by using compliance management to identify and re-mediate non compliance machines. for e.g environment we have 20 approved application just want to know if machines having other software apart from 20 approved application?

second question is remediation means it fix only registry values it does not uninstall/install non approved software?

Third question is how to get report to determine approved software is installed i mean application installed (Compliant machine list) and non approved software installed machines (non compliant machines) in enterprise level

i would request answer 3 query with sample or examples

1. Anything is possible with enough time and money. However what you are asking for will virtually impossible to create.
2. You can use a script to do this but again this will be virtually impossible to create
3. See #1.

1. Just use the application model for that. That provides exactly that behavior;
2. Depends on the type of settings. I won't install an application, if that's what you're looking for;
3. Based on #1 you can use the deployment compliance reports. When you want something for installed applications by the users that will be a hell of a job. You would have to use the inventory and hold that against the different applications targeted to the user/ device.. Nearly impossible to get really accurate results, if you ask me...