This problem is Windows Vista-related. I have an application that writes to its own directory (usually in Program Files\whatever), so the written file ends up in VirtualStore. I cannot change this behaviour, as the application is not mine.
When uninstalling this app in Windows Vista through Control Panel / Programs and Features, I am unable to get CallFunctionAsUser to reach the guest user. Instead, the function is called as the (admin-)user that the uninstaller was elevated to.
I have attached an example script. The installer manually creates a file in the Guest User's VirtualStore, and the uninstaller tries to delete it.
1) I login as guest user and run install.
2) It asks for an Admin login, so I log in as my standard account, "Maarten".
3) Installation completes successfully.
4) I go to Control Panel / Programs and Features, and start uninstall.
5) It asks for an Admin login, so I log in as my standard account, "Maarten".
6) The output of the MessageBox call is: C:\Users\Maarten\AppData\Local\VirtualStore\Program Files\UAC Test\test.dat
In other words, un.UserFunction was called as Maarten, not as Guest User. However, if I start the uninstaller manually through Explorer, the function DOES get called as Guest User.
My question is now, is this a bug in the UAC plugin, a 'feature' in Windows, or am I doing something wrong?
Thanks in advance for any help.
Control Panel uninstall wont CallAs Guest user
2 posts
Are you a developer who uses NSIS to distribute your application? Are you a Winamp plug-in developer who wants to use NSIS to distribute your plug-in? Have suggestions for other people like you? This is the place.
So, the UAC plugin is not the real solution here, if you are admin, you can enumerate all the users anyway, so use http://nsis.sourceforge.net/EnumUsersReg , figure out the path to the virtual store and delete your folder