You might want to change the location of your system default folder (C:\Program Files) from C drive to another system drives (D or E drive). By default software setup will attempt to install program in C:\Program Files directory. It is good practice to make the backup of the installed programs, if you installed all your programs in other than C drive. If you have little knowledge about editing the Windows Registry, then you can configure your computer for this purpose.
Follow these instructions to make changes in Registry: