I am the administrator for one the SharePoint site and when I am trying to open the library via windows explorer.Can any one help me how can I over come from this issue
I had the same issue, in my case it was resolved by adding the url of the SharePoint site to the Local Intranet sites (or Trusted sites) of the browser.
Check if you have sufficient permission on the document library and its documents.
If permission is all correct, then the problem looks like in your file name. Check your File Name, Length, and Invalid Character Restrictions and Recommendations.