Setting up Visual Studio to use a symbol server can greatly improve your ability to debug problems. However, adding a symbol server can significantly slow down debugging as Visual Studio searches for symbols not in the cache each time a DLL loads for a debugging session and loads symbols for DLLs that are not relevant for your debugging. You’ll get a huge speed-up by telling Visual Studio to skip loading symbols for these modules. Follow the steps below tell Visual Studio to skip loading these symbols.

## Identify Modules to Skip

1. Start debugging
2. In the Output window, search for “Cannot find or open the PDB file”

## Exclude Modules from Automatic Symbol Loading

1. Click Tools > Options... and select the page Debugging > Symbols
2. Click Specify excluded modules`
3. Add each of the items from the previous step to this list