Missing symbols and PDB files

I am using Microsoft Visual Studio 2010 Express (installed today) on Windows 8 64-bit operating system. Trying to run a very simple C++ program and get these unrelated errors. Googled up and there's a wide range of info, one even suggesting to install a QFE component that would install the missing symbols and DLLs? I was wondering if experts on this forum could help or point me in the right direction please. Thanks a million!

P.S. What are symbols?

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'skNn.exe': Loaded 'C:\Users\S\Documents\Visual Studio 2010\Projects\skNn\Debug\skNn.exe', Symbols loaded.
'skNn.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Cannot find or open the PDB file
'skNn.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Cannot find or open the PDB file
'skNn.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Cannot find or open the PDB file
'skNn.exe': Loaded 'C:\Windows\SysWOW64\apphelp.dll', Cannot find or open the PDB file
SHIMVIEW: ShimInfo(Complete)
'skNn.exe': Loaded 'C:\ProgramData\Norton\{0C55C096-0F1D-4F28-AAA2-85EF591126E7}\NIS_20.0.0.136\Definitions\BASHDefs\20130620.001\UMEngx86.dll', Cannot find or open the PDB file
'skNn.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Cannot find or open the PDB file
The thread 'Win32 Thread' (0x8bc) has exited with code 0 (0x0).
The program '[7248] skNn.exe: Native' has exited with code 0 (0x0).
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