Error:

The setup has an encountered unexpected error while updating installed files: system cannot find the file specified

Snapshot:

Workaround 1:

Install the Microsoft SQL Server 2005 setup in the Administrator login.

Workaround 2: [For Windows Vista, Windows 7 or Windows 8]

You must use “Turn Windows features on or off” in the Control Panel to install or configure Microsoft .Net Framework 3.5 SP1″

1. Go to: start/control panel/programs and features
2. On the top left you should see “Turn windows features on or off” click on that
3. Find “Microsoft .NET framework 3.5.1″ when the window opens
4. Click the + sign next to it to expand it so you can now see:
   “Windows Communication Foundation HTTP Activation”
   “Windows Communication Foundation HTTP non-Activation”
5. Make sure there is a tick in both boxes and select OK.