Well heres how I did the PerfectDisk2008 silent install: 1. Download latest PerfectDisk2008 version/installer. 2. Extract installation files from the .exe installer with 7-zip. 3. Remove uncessary install files (folders), like i removed x64 (64-bit) OS installation folder, I got x86 (32-bit) OS. 4. Go to folder ...\x86\program files\Raxco\PerfectDisk2008 and find config.ini 5. Open config.ini with notepad for example. 6. First you must enable the use of config.ini during installation. [Config.ini] #Set this value to 1 to enable configuration with Config.ini file. Enabled=1 7. Go to the bottom of the config.ini to [License] -section and put your License key in "LicenseKey=NNN-NNNNNNN-NNNNNN-NNNN" replace the "NNN-NNNNNNN-NNNNNN-NNNN" with your license key. [License] # Allow inputing a license key on install # LicenseKey = NNN-NNNNNNN-NNNNNN-NNNN # where NNN-NNNNNNN-NNNNNN-NNNN is a valid license key. # default = null LicenseKey=NNN-NNNNNNN-NNNNNN-NNNN 8. U also can modify other setting in the config.ini -file for your taste. 9. Save the config.ini file. 10. Run "PerfectDisk_x86.msi" from X86 -folder with "/qb /norestart" switches or whatever switches u like to use. Hope u understood!