I have already provided ASP .NET account, Network and Network Services full acess on the website. But the exception remains the same.
Hope the info given below will might helpful
Stack Trace: at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize)
at System.IO.File.OpenFile(String path, FileAccess access, SafeFileHandle& handle)
at System.IO.File.SetLastWriteTimeUtc(String path, DateTime lastWriteTimeUtc)
at System.IO.File.SetLastWriteTime(String path, DateTime lastWriteTime)
at DotNetNuke.Common.Utilities.Config.Touch() in D:\Subway\UserEditingDelegation\Library\Components\Shared\Config.vb:line 319
at DotNetNuke.Services.Install.Install.Page_Load(Object sender, EventArgs e) in D:\Subway\UserEditingDelegation\Website\Install\Install.aspx.vb:line 351
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Please reply as soon as possible.