One of the most common reasons a computer will have difficulties running OptiShot is because it does not have the most recent video drivers. 

Computer manufacturers do not continually update the video drivers for the computers they sell. Because of this, it is not uncommon for a two year old computer to be unable to run the latest graphics intensive software such as video games and the OptiShot Simulator. For this reason, it is important to get video drivers from the actual graphics card manufacturer. The problem with this is that graphics card manufacturers try to detect the driver currently installed on computers. If they find a driver from the computer manufacturer installed, they will deny you their latest version.

The directions below get around these checks and will help you the latest version possible for your video card.

STEP 1: FIND THE NAME AND THE MANUFACTURER OF THE VIDEO CARD

• Windows® Vista or Windows® 7
1. Click Start
2. Click in the Search box found at the bottom of the Start menu and type dxdiag and hit Enter.
3. On the DirectX Diagnostic Tool click the tab labeled Display.
4. From the Device section write down the Name and Manufacturer.
• Windows® XP
1. Click Start
2. Click Run and type dxdiag and hit Enter.
3. On the DirectX Diagnostic Tool click the tab labeled Display.
4. From the Device section write down the Name and Manufacturer.

STEP 2: UNINSTALL THE CURRENT DISPLAY ADAPTER FROM DEVICE MANAGER

• Click the  Start button.
• Right click on Computer (or My Computer) and choose Manage to open the Computer Management window.
• On the left hand side click Device Manager.
• Double-click Display adapters to expand the list.
• Right-click the display device in the expanded list and then click Uninstall.
  
  
• On the Confirm Device Uninstall window place a check in the box next to "Delete the driver software for this device."
  
  
• Click OK to complete the uninstall process.  Please note that your screen resolution will likely change and look quite poor until Step 3 below is completed.
• Restart the computer and then move on to Step 3.

STEP 3: GET THE LATEST DRIVERS FOR YOUR VIDEO CARD

• NVIDIA CARDS
• NVidia Driver Site
• Select Option 1 or Option 2 and follow the instructions.
   
• ATI CARDS
• ATI Driver Site
• Follow the 5 steps and any further instructions.
   
• INTEL CARDS
• Intel Driver Site
• Use the Find Downloads by Product Name section to locate, download and install your driver.