Windows – What folder are installation logs in

installationinstallerloggingwindowswindows 7

If an installer stores a log of the installation process, where would I find that log?

If there is an installer that does not log the installation process, how can I make it do so?

Best Answer

Windows installer logs are usually kept in the temp folder, you can get to this by going to run or an explorer bar and type the location as %temp%.

The default folder for this is:

C:\Users\<username>\AppData\Local\Temp

From This MS Support page:

To enable Windows Installer logging yourself, open the registry with Regedit.exe and create the following path and keys:

HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer

Reg_SZ: Logging

Value: voicewarmupx

The letters in the value field can be in any order. Each letter turns on a different logging mode. Each letter's actual function is as follows for MSI version 1.1:

v - Verbose output

o - Out-of-disk-space messages

i - Status messages

c - Initial UI parameters

e - All error messages

w - Non-fatal warnings

a - Start up of actions

r - Action-specific records

m - Out-of-memory or fatal exit information

u - User requests

p - Terminal properties

+ -Append to existing file

! - Flush each line to the log

x - Extra debugging information. The "x" flag is available only on Windows Server 2003 and later operating systems, and on the MSI redistributable version 3.0, and on later versions of the MSI redistributable.

"" - Wildcard, log all information except for the v and the x option. To include the v and the x option, specify "/lvx".

Note This should be used only for troubleshooting purposes and should not be left on because it will have adverse effects on system performance and disk space. Each time you use the Add/Remove Programs tool in Control Panel, a new Msi*.log file is created.


Please note that the above is just for MSI files or setups that take advantage of the Windows Installer. Some others will also create log files either in the temp folder, their application directory or the root of the hard drive. There is no one answer fits all.