Same as /LOG, except it allows you to specify a fixed path/filename to use for the log file. Nor is it designed to be machine-parseable the format of the file is subject to change without notice. The information contained in the log file is technical in nature and therefore not intended to be understandable by end users. (It will not overwrite or append to existing files.) The log file is created with a unique name based on the current date. For example, if you suspect a file isn't being replaced when you believe it should be (or vice versa), the log file will tell you if the file was really skipped, and why.
When a setup is very silent this installation progress window is not displayed. When Setup is silent the wizard and the background window are not displayed but the installation progress window is. Instructs Setup to be silent or very silent. Of course, this will have no effect if the DisableStartupPrompt section directive was set to yes. Do you wish to continue? prompt at the beginning of Setup. These can be useful to system administrators, and to other programs calling the Setup program. The Setup program accepts optional command line parameters.