Re: unnecessary files in the User Documents folder
Surendra - I did experience this issue in User Documents. These may be old qvws residing in folders other than mounting folder. I searched through my server and cleared them up. Did you search all folders in your environment?
Koushik solution would work for the Source Documents. However, you need to search your server through Windows search and identify these files. I found it in QVSSettings folder and don't know how qvw was dropped there? It is locked down by the QlikView service account and deleted it manually logging in as Admin.