# Installer bug **URL:** \ **Category:** Uncategorized\ **Created:** [June 20, 2003, 11:43am UTC](https://psychtoolbox.discourse.group/t/installer-bug/865 "2003-06-20T11:43:38Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\ **Post date:** [June 20, 2003, 11:43am UTC](https://psychtoolbox.discourse.group/t/installer-bug/865/1 "2003-06-20T11:43:38Z")
I have just installed the psychtoolbox but now I find that I cannot open Matlab to use it! each time I open Matlab it runs the installer and opens the psychtoolbox website but does not open Matlab comand window. Please help! Mark Roberts ---
**Author:** ![ingling7](https://avatars.discourse-cdn.com/v4/letter/i/e79b87/32.png) [@ingling7](https://psychtoolbox.discourse.group/u/ingling7)\ **Post date:** [June 24, 2003, 1:58am UTC](https://psychtoolbox.discourse.group/t/installer-bug/865/2 "2003-06-24T01:58:09Z")
On Friday, June 20, 2003, at 07:43 AM, Mark.Roberts wrote: > \> I have just installed the psychtoolbox but now I find that I cannot > \> open > \> Matlab to use it! each time I open Matlab it runs the installer and > \> opens the > \> psychtoolbox website but does not open Matlab comand window. > \> > \> Please help! > \> > \> Mark Roberts Mark, This is strange and unexpected, more so than most bugs. I don't have any ideas, so I'll ask questions instead: By what method are you launching Matlab ? By double-clicking the desktop icon or by using the Matlab entry in the Windows Start menu ? Were you launching Matlab by the same method before you installed the Psychtoolbox ? What happens if you remove the Psychtoolbox installer from your computer and then try to launch Matlab ? It should be safe to do that, you can always download a fresh copy if necessary. Best, Allen