Do you have speed issues?
First check your computer with PC Health Advisor PC Health Advisor is the digital doctor you need to scan, find, and fix
.PCH File Extensions
.PCH file extension
|File Format Description||
PCH files are used by Microsoft Visual C++ and other software development programs, such as Apple Xcode. PCH files used by Xcode are called Prefix Header files and are typically named "[name]_Prefix.pch."
|Program(s) that open .PCH files||