I like to keep my main drive running mainly the OS.
On my second drive I like to install the majority of my programs. However, windows always wants to install programs to “c:\program files” and changing it everytime can be a pain.
After you back up your registry, this is how you can change this default location.
1. Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
2. Find ProgramFilesDir whose default should be C:\Program Files
3. Change this to whatever directory you wish. I changed it to D:\Program Files for example.
Remember you have to reboot for your changes to show.