Hi,
I would say that originally someone went thru & manually set the access permissions for groups user & poweruser for the app & associated dll's etc, whereas it should have been done via a group policy and changed when the upgrade was installed.

>Hi Sergey,
>
>it finaly comes out that they restricted the user to user group "user" - but they have done this months ago.
>
>We have set them back to "power users" and everything works as expected.
>
>This does not explain why it works on friday, but for now the customer can work.
>
>Do you (or somebody else) has an idea how this can happen?
>
>Old Version istalled, users are "power user" -> all runs as expected
>user changed to "user" -> all runs as expected (even registry r/w access to HKEY_LOCAL_MACHINE)
>new version installed -> dlls not found, after putting a copy of the dlls to the exe registry fails
>new version deinstalled, old version installed -> dlls not found, after putting a copy of the dlls to the exe registry fails
>
>
>Anyway I set the ALLUSER msi property to "1" via Installscript now.
>
>Thanks for your asistance
>
>Agnes
>>Agnes,
>>
>>See Re: Installing VFP 9 Run-time on Win 2000 Message #1055345
>>
>>>I'will check tomorrow. You have the form's name at hand? ISD's doc is a little bit clumsy. (I'm still wondering how far I came with it.) Better would be to have the property that will be set by this form. (So I can skip that form)
>>>
>>>What I didn't see is why it was runing for years without it. (The customer didn't change his users and I not my installation)