That issues seemed to be fine the next time I went on to it. Was able to pick up and interact with people and objects. But during combat I will press to attack or move and it will take multiple times of pressing before they will actually do it. I thought I should mention it and hope it helps.
These are my specs as well:  Machine name: DELL-PC
   Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130828-1532)
           Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
       System Model: Studio 1555
               BIOS: Ver 1.00 BIOS A07 PARTTBL
          Processor: Intel(R) Core(TM)2 Duo CPU     P7450  @ 2.13GHz (2 CPUs), ~2.1GHz
             Memory: 4096MB RAM
Available OS Memory: 4060MB RAM
          Page File: 2065MB used, 8493MB available
        Windows Dir: C:\Windows
    DirectX Version: DirectX 11
DX Setup Parameters: Not found
   User DPI Setting: Using System DPI
 System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
     DxDiag Version: 6.01.7601.17514 32bit Unicode
 
Well, truth to be told your notebook is a bit weak. Most of the issues you are having right now is due to unpolished state of the game. There will be performance issues on such system.