After I download and try to install Windows Defender, I get a message that
says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE APPLICATION
VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.

Hello Dan,

Maybe your installer is corrupt. Have a look at this articles. It may be
relevant to your problem.

http://support.microsoft.com/kb/893803
http://support.microsoft.com/kb/898715
Еиςеl
--


"Dan" wrote:

> After I download and try to install Windows Defender, I get a message that
> says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE APPLICATION
> VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
>

Is the name of the downloaded file WindowsDefender.msi?

--

"Dan" <(E-Mail Removed)> wrote in message
news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
> After I download and try to install Windows Defender, I get a message that
> says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
> APPLICATION
> VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
>

Hi Bill,

I posted this in 2 locations, thanks for responding to both. I've responded
over in the anti-spyware general discussion.

Thanks for the follow-up.

Dan

"Bill Sanderson" wrote:

> Is the name of the downloaded file WindowsDefender.msi?
>
> --
>
> "Dan" <(E-Mail Removed)> wrote in message
> news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
> > After I download and try to install Windows Defender, I get a message that
> > says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
> > APPLICATION
> > VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
> >
>
>
>

Thanks - too many threads, too little time...

--

"Dan" <(E-Mail Removed)> wrote in message
news:CD1C8507-8122-4648-A3CC-(E-Mail Removed)...
> Hi Bill,
>
> I posted this in 2 locations, thanks for responding to both. I've
> responded
> over in the anti-spyware general discussion.
>
> Thanks for the follow-up.
>
> Dan
>
> "Bill Sanderson" wrote:
>
>> Is the name of the downloaded file WindowsDefender.msi?
>>
>> --
>>
>> "Dan" <(E-Mail Removed)> wrote in message
>> news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
>> > After I download and try to install Windows Defender, I get a message
>> > that
>> > says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
>> > APPLICATION
>> > VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
>> >
>>
>>
>>

I've experinced the same message when I tried to install the program.
Additionally, I've received a security warning saying "Publisher could not
be verified. Windows Installer Pkg. File does not have a valid digital
signature. I'm running XP SP2, and downloaded the Windows Defender.MSI

So . . . . I never really did understand if you got an answer to the
question or not - 'cause I need to know the answer also.
Thanks
Jan

"Bill Sanderson" wrote:

> Thanks - too many threads, too little time...
>
> --
>
> "Dan" <(E-Mail Removed)> wrote in message
> news:CD1C8507-8122-4648-A3CC-(E-Mail Removed)...
> > Hi Bill,
> >
> > I posted this in 2 locations, thanks for responding to both. I've
> > responded
> > over in the anti-spyware general discussion.
> >
> > Thanks for the follow-up.
> >
> > Dan
> >
> > "Bill Sanderson" wrote:
> >
> >> Is the name of the downloaded file WindowsDefender.msi?
> >>
> >> --
> >>
> >> "Dan" <(E-Mail Removed)> wrote in message
> >> news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
> >> > After I download and try to install Windows Defender, I get a message
> >> > that
> >> > says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
> >> > APPLICATION
> >> > VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
> >> >
> >>
> >>
> >>
>
>
>

I can't find the other thread to see whether it was resolved or not.

I would recommend downloading anew, without using any download manager, if
possible. Save the download to a known location such as the desktop.

Then, disable real-time protection from your antivirus--just for the
duration of the install--enable it afterwards.

Run the downloaded file to do the install.



--

"Barts" <(E-Mail Removed)> wrote in message
news:08A1E41E-D14F-49D9-9B99-(E-Mail Removed)...
> I've experinced the same message when I tried to install the program.
> Additionally, I've received a security warning saying "Publisher could
> not
> be verified. Windows Installer Pkg. File does not have a valid digital
> signature. I'm running XP SP2, and downloaded the Windows Defender.MSI
>
> So . . . . I never really did understand if you got an answer to the
> question or not - 'cause I need to know the answer also.
> Thanks
> Jan
>
> "Bill Sanderson" wrote:
>
>> Thanks - too many threads, too little time...
>>
>> --
>>
>> "Dan" <(E-Mail Removed)> wrote in message
>> news:CD1C8507-8122-4648-A3CC-(E-Mail Removed)...
>> > Hi Bill,
>> >
>> > I posted this in 2 locations, thanks for responding to both. I've
>> > responded
>> > over in the anti-spyware general discussion.
>> >
>> > Thanks for the follow-up.
>> >
>> > Dan
>> >
>> > "Bill Sanderson" wrote:
>> >
>> >> Is the name of the downloaded file WindowsDefender.msi?
>> >>
>> >> --
>> >>
>> >> "Dan" <(E-Mail Removed)> wrote in message
>> >> news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
>> >> > After I download and try to install Windows Defender, I get a
>> >> > message
>> >> > that
>> >> > says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
>> >> > APPLICATION
>> >> > VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
>> >> >
>> >>
>> >>
>> >>
>>
>>
>>

Thanks for replying, Bill.

I dread downloading the program again since I’m on dial-up and it takes
so-o-o long. First, I’ll disable my anti-virus (I use AVG) and my firewall
and try the install one more time. If unsuccessful, I’ll re-download.

You suggested downloading the program “without using any download manager, if
possible”. Since I’m only moderately advanced on computers, I haven’t a
clue how to attempt that. Can you offer any further advise?

Thanks so much for your help.
Barts


"Bill Sanderson" wrote:

> I can't find the other thread to see whether it was resolved or not.
>
> I would recommend downloading anew, without using any download manager, if
> possible. Save the download to a known location such as the desktop.
>
> Then, disable real-time protection from your antivirus--just for the
> duration of the install--enable it afterwards.
>
> Run the downloaded file to do the install.
>
>
>
> --
>
> "Barts" <(E-Mail Removed)> wrote in message
> news:08A1E41E-D14F-49D9-9B99-(E-Mail Removed)...
> > I've experinced the same message when I tried to install the program.
> > Additionally, I've received a security warning saying "Publisher could
> > not
> > be verified. Windows Installer Pkg. File does not have a valid digital
> > signature. I'm running XP SP2, and downloaded the Windows Defender.MSI
> >
> > So . . . . I never really did understand if you got an answer to the
> > question or not - 'cause I need to know the answer also.
> > Thanks
> > Jan
> >
> > "Bill Sanderson" wrote:
> >
> >> Thanks - too many threads, too little time...
> >>
> >> --
> >>
> >> "Dan" <(E-Mail Removed)> wrote in message
> >> news:CD1C8507-8122-4648-A3CC-(E-Mail Removed)...
> >> > Hi Bill,
> >> >
> >> > I posted this in 2 locations, thanks for responding to both. I've
> >> > responded
> >> > over in the anti-spyware general discussion.
> >> >
> >> > Thanks for the follow-up.
> >> >
> >> > Dan
> >> >
> >> > "Bill Sanderson" wrote:
> >> >
> >> >> Is the name of the downloaded file WindowsDefender.msi?
> >> >>
> >> >> --
> >> >>
> >> >> "Dan" <(E-Mail Removed)> wrote in message
> >> >> news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
> >> >> > After I download and try to install Windows Defender, I get a
> >> >> > message
> >> >> > that
> >> >> > says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
> >> >> > APPLICATION
> >> >> > VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
> >> >> >
> >> >>
> >> >>
> >> >>
> >>
> >>
> >>
>
>
>

If you aren't aware of using a download manager, don't worry about it. I'm
involved in another thread where an unusual message accompanies a download
failure, and I suspect some other "agent" is involved in the download
process. In your case, I don't see evidence of that.

There should be no need to disable a firewall--I wouldn't recommend
that--but disabling the Antivirus during the installation process may help.
I have installed on several machines protected by AVG Free version without
any problems, though.

I suspect, in the end, that another download will be necessary. If you do
one, save the file to a known location--such as the desktop--don't just run
directly from the download dialogs.

--

"Barts" <(E-Mail Removed)> wrote in message
news:644A098C-8F91-43ED-B4B9-(E-Mail Removed)...
> Thanks for replying, Bill.
>
> I dread downloading the program again since I'm on dial-up and it takes
> so-o-o long. First, I'll disable my anti-virus (I use AVG) and my
> firewall
> and try the install one more time. If unsuccessful, I'll re-download.
>
> You suggested downloading the program "without using any download manager,
> if
> possible". Since I'm only moderately advanced on computers, I haven't a
> clue how to attempt that. Can you offer any further advise?
>
> Thanks so much for your help.
> Barts
>
>
> "Bill Sanderson" wrote:
>
>> I can't find the other thread to see whether it was resolved or not.
>>
>> I would recommend downloading anew, without using any download manager,
>> if
>> possible. Save the download to a known location such as the desktop.
>>
>> Then, disable real-time protection from your antivirus--just for the
>> duration of the install--enable it afterwards.
>>
>> Run the downloaded file to do the install.
>>
>>
>>
>> --
>>
>> "Barts" <(E-Mail Removed)> wrote in message
>> news:08A1E41E-D14F-49D9-9B99-(E-Mail Removed)...
>> > I've experinced the same message when I tried to install the program.
>> > Additionally, I've received a security warning saying "Publisher
>> > could
>> > not
>> > be verified. Windows Installer Pkg. File does not have a valid
>> > digital
>> > signature. I'm running XP SP2, and downloaded the Windows Defender.MSI
>> >
>> > So . . . . I never really did understand if you got an answer to the
>> > question or not - 'cause I need to know the answer also.
>> > Thanks
>> > Jan
>> >
>> > "Bill Sanderson" wrote:
>> >
>> >> Thanks - too many threads, too little time...
>> >>
>> >> --
>> >>
>> >> "Dan" <(E-Mail Removed)> wrote in message
>> >> news:CD1C8507-8122-4648-A3CC-(E-Mail Removed)...
>> >> > Hi Bill,
>> >> >
>> >> > I posted this in 2 locations, thanks for responding to both. I've
>> >> > responded
>> >> > over in the anti-spyware general discussion.
>> >> >
>> >> > Thanks for the follow-up.
>> >> >
>> >> > Dan
>> >> >
>> >> > "Bill Sanderson" wrote:
>> >> >
>> >> >> Is the name of the downloaded file WindowsDefender.msi?
>> >> >>
>> >> >> --
>> >> >>
>> >> >> "Dan" <(E-Mail Removed)> wrote in message
>> >> >> news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
>> >> >> > After I download and try to install Windows Defender, I get a
>> >> >> > message
>> >> >> > that
>> >> >> > says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
>> >> >> > APPLICATION
>> >> >> > VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
>> >> >> >
>> >> >>
>> >> >>
>> >> >>
>> >>
>> >>
>> >>
>>
>>
>>

Thank you again, Bill,
Hopefully this is the last time I'll have to post to this. i disabled my
anti-virus and downloaded again. It hung up at 6.02 MB and just churned away
with no additional progress. That only took about an hour (of wasted time).
Finally I started shutting down things in the Task Manager - unfortunately I
don't know what a lot of the processes are, so I crossed my fingers and kept
closing out programs. I downloaded one more time - this time I got it and
it only took about 30 minutes.

After installing, it asked to check for updates. But when I tried for the
updates, they wouldn't download.

Anyway, long story short, it eventually popped up and asked to perform a
scan, which I allowed - so I'm assuming it's now running and fully
functional. I don't, however, know if my shutting down various programs
allowed the download to finally happen - or if it was just "third time is
charm".

But thanks again for you help.
Barts

"Bill Sanderson" wrote:

> If you aren't aware of using a download manager, don't worry about it. I'm
> involved in another thread where an unusual message accompanies a download
> failure, and I suspect some other "agent" is involved in the download
> process. In your case, I don't see evidence of that.
>
> There should be no need to disable a firewall--I wouldn't recommend
> that--but disabling the Antivirus during the installation process may help.
> I have installed on several machines protected by AVG Free version without
> any problems, though.
>
> I suspect, in the end, that another download will be necessary. If you do
> one, save the file to a known location--such as the desktop--don't just run
> directly from the download dialogs.
>
> --
>
> "Barts" <(E-Mail Removed)> wrote in message
> news:644A098C-8F91-43ED-B4B9-(E-Mail Removed)...
> > Thanks for replying, Bill.
> >
> > I dread downloading the program again since I'm on dial-up and it takes
> > so-o-o long. First, I'll disable my anti-virus (I use AVG) and my
> > firewall
> > and try the install one more time. If unsuccessful, I'll re-download.
> >
> > You suggested downloading the program "without using any download manager,
> > if
> > possible". Since I'm only moderately advanced on computers, I haven't a
> > clue how to attempt that. Can you offer any further advise?
> >
> > Thanks so much for your help.
> > Barts
> >
> >
> > "Bill Sanderson" wrote:
> >
> >> I can't find the other thread to see whether it was resolved or not.
> >>
> >> I would recommend downloading anew, without using any download manager,
> >> if
> >> possible. Save the download to a known location such as the desktop.
> >>
> >> Then, disable real-time protection from your antivirus--just for the
> >> duration of the install--enable it afterwards.
> >>
> >> Run the downloaded file to do the install.
> >>
> >>
> >>
> >> --
> >>
> >> "Barts" <(E-Mail Removed)> wrote in message
> >> news:08A1E41E-D14F-49D9-9B99-(E-Mail Removed)...
> >> > I've experinced the same message when I tried to install the program.
> >> > Additionally, I've received a security warning saying "Publisher
> >> > could
> >> > not
> >> > be verified. Windows Installer Pkg. File does not have a valid
> >> > digital
> >> > signature. I'm running XP SP2, and downloaded the Windows Defender.MSI
> >> >
> >> > So . . . . I never really did understand if you got an answer to the
> >> > question or not - 'cause I need to know the answer also.
> >> > Thanks
> >> > Jan
> >> >
> >> > "Bill Sanderson" wrote:
> >> >
> >> >> Thanks - too many threads, too little time...
> >> >>
> >> >> --
> >> >>
> >> >> "Dan" <(E-Mail Removed)> wrote in message
> >> >> news:CD1C8507-8122-4648-A3CC-(E-Mail Removed)...
> >> >> > Hi Bill,
> >> >> >
> >> >> > I posted this in 2 locations, thanks for responding to both. I've
> >> >> > responded
> >> >> > over in the anti-spyware general discussion.
> >> >> >
> >> >> > Thanks for the follow-up.
> >> >> >
> >> >> > Dan
> >> >> >
> >> >> > "Bill Sanderson" wrote:
> >> >> >
> >> >> >> Is the name of the downloaded file WindowsDefender.msi?
> >> >> >>
> >> >> >> --
> >> >> >>
> >> >> >> "Dan" <(E-Mail Removed)> wrote in message
> >> >> >> news:0F4BA3E0-D2BE-417F-9B74-(E-Mail Removed)...
> >> >> >> > After I download and try to install Windows Defender, I get a
> >> >> >> > message
> >> >> >> > that
> >> >> >> > says: THIS INSTALLATION PACKAGE COULD NOT BE OPENED. CONTACT THE
> >> >> >> > APPLICATION
> >> >> >> > VENDOR TO VERIFY THAT THIS IS A VALID WINDOWS INSTALLER PACKAGE.
> >> >> >> >
> >> >> >>
> >> >> >>
> >> >> >>
> >> >>
> >> >>
> >> >>
> >>
> >>
> >>
>
>
>