Unable to Uninstall Symantic Endpoint

I am not being able to uninstall endpoint from my Laptop. Some of the files were deleted i imagine. I dont even have CD i bought. The product no is 11.0.4000.2295

Will you please help me out. I was trying to do manually through registry editor but I couldnt figure out which is the uninstall code for this product.

I was trying these steps, but I dont have product uninstall key....

To uninstall the Symantec Endpoint client using comand line:

1. Log on the system with administrator rights.
2. Find the Symantec Endpoint Protection uninstallation product key:
3. Click Start, then Run.
4. Type regedit to open the Windows reistry editor.
5. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
6. Browse the Uninstall sub keys in the left-hand pane, check the values in the right-hand pane to find a value for DisplayName that is Symantec Endpoint Protection.
7. Copy the uninstallation key.
   For example the key for Symantec Endpoint Protection Version 11.0.776.1100 is 3B98507E-8B81-43EE-A77D-9C3E90EC3E2F
8. Click Start, then Run.
9. Type cmd to open the Windows command prompt.
10. At the Windows command prompt type:
    msiexec /X {product uninstall key}
    For Example: msiexec.exe /x {3B98507E-8B81-43EE-A77D-9C3E90EC3E2F} /passive
    
    To generate a detailed uninstall log type:
    msiexec /X {product uninstall key} /I*v! log file path

Example: msiexec /x {3B98507E-8B81-43EE-A77D-9C3E90EC3E2F} /lv!* c:\uninstallSEP.txt

Note: If the MSI uninstall has stopped responding:

1. Click Start, then Run.
2. Type taskmgr
3. Click the Processes tab.
4. Click End Process for all of the running windows installer processes by: Right-clicking on msiexec.exe then clicking End Process.
5. Repeat this task for each instance of "msiexec.exe" listed.