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What does %WinDir% mean?

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Old 10-21-2009, 07:30 PM   #1
Laurel
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Default What does %WinDir% mean?

I got the following instructions from an MS web page for cleaning up the
COM+ registry. I don't understand the %Windir% convention. Can I do this
rename via Windows explorer? Which directory are they talking about?

1.. Rename the %WinDir%\System32\Clbcatq.dll file to
%WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde (~) at
the start of the file name.
TIA
LAS



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Old 10-21-2009, 07:30 PM   #2
Bob I
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Posts: n/a
Default Re: What does %WinDir% mean?

C:\Windows

C:\WinNT

or other

Laurel wrote:

> I got the following instructions from an MS web page for cleaning up the
> COM+ registry. I don't understand the %Windir% convention. Can I do this
> rename via Windows explorer? Which directory are they talking about?
>
> 1.. Rename the %WinDir%\System32\Clbcatq.dll file to
> %WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde (~) at
> the start of the file name.
> TIA
> LAS
>
>


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Old 10-21-2009, 07:30 PM   #3
Bert Hyman
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Default Re: What does %WinDir% mean?

In news:eTInaAoUKHA.5584@TK2MSFTNGP05.phx.gbl "Laurel"
<FakeMail@Hotmail.com> wrote:

> I got the following instructions from an MS web page for cleaning up
> the COM+ registry. I don't understand the %Windir% convention. Can I
> do this rename via Windows explorer? Which directory are they talking
> about?


That's just a shorthand notation for the drive and directory in which
Windows is installed; not everyone installs stuff in the same place.

However, it ->usually means "C:\windows".

> 1.. Rename the %WinDir%\System32\Clbcatq.dll file to
> %WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde
> (~) at the start of the file name.


And yes, you should be able to navigate to C:\windows\system32 and
rename that file using explorer.

--
Bert Hyman St. Paul, MN bert@iphouse.com
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Old 10-21-2009, 07:30 PM   #4
VanguardLH
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Posts: n/a
Default Re: What does %WinDir% mean?

Laurel wrote:

> I got the following instructions from an MS web page for cleaning up the
> COM+ registry. I don't understand the %Windir% convention. Can I do this
> rename via Windows explorer? Which directory are they talking about?
>
> 1.. Rename the %WinDir%\System32\Clbcatq.dll file to
> %WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde (~) at
> the start of the file name.
> TIA
> LAS


%varname% says to resolve the value defined for an environment variable.
Many envvars are defined by Windows, by apps that modify the PATH, or by
programs or batch files. You can see what they are by running the
following in a command shell:

set | more

You are piping the output of the 'set' command to the 'more' command
which pauses output when it exceeds the window's height. Press the
Enter key to scroll forward a line at a time, or the Spacebar to page
forward through the paused listing.

You'll notice that there is an environment variable named "windir" which
is assigned a non-blank value. When you want to use an environment
variable's value, you enclose it within percentage signs, so %windir%
return the value of the environment variable named "windir".
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Old 10-21-2009, 11:30 PM   #5
Jim
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Posts: n/a
Default Re: What does %WinDir% mean?

It is an environment variable. The % characters enable substitution of the
contents of the variable into the command line.
Jim
"Laurel" <FakeMail@Hotmail.com> wrote in message
news:eTInaAoUKHA.5584@TK2MSFTNGP05.phx.gbl...
>I got the following instructions from an MS web page for cleaning up the
>COM+ registry. I don't understand the %Windir% convention. Can I do this
>rename via Windows explorer? Which directory are they talking about?
>
> 1.. Rename the %WinDir%\System32\Clbcatq.dll file to
> %WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde (~)
> at the start of the file name.
> TIA
> LAS
>




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Old 10-21-2009, 11:30 PM   #6
Roger
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Posts: n/a
Default Re: What does %WinDir% mean?

At Start/Run enter %WinDir% and press Enter. Explorer will open showing
you the WinDir address.

On 10/21/2009 1:55 PM, Laurel wrote:
> I got the following instructions from an MS web page for cleaning up the
> COM+ registry. I don't understand the %Windir% convention. Can I do this
> rename via Windows explorer? Which directory are they talking about?
>
> 1.. Rename the %WinDir%\System32\Clbcatq.dll file to
> %WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde (~) at
> the start of the file name.
> TIA
> LAS
>
>


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Old 10-22-2009, 12:30 AM   #7
Laurel
Guest
 
Posts: n/a
Default Re: What does %WinDir% mean?


Interesting. I think the other folks probably gave me what I needed for my
original question, but I'd like to know more about set|more. I tried it,
but found no environment variable associated with WINDIR. The last entries
in the alphabetized list were for
SYSTEMROOT,TEMP,TMP,USERDNSDOMAIN,USERDOMAIN,USERN AME,USERPROFILE,
USDEFLOGDIR and then
Protection
BLASTER.

Perhaps there really is no WINDIR variable, and it's just a convention to
use environmental variable syntax?

"VanguardLH" <V@nguard.LH> wrote in message
news:hbnmpf$2fn$1@news.albasani.net...
> Laurel wrote:
>
>> I got the following instructions from an MS web page for cleaning up the
>> COM+ registry. I don't understand the %Windir% convention. Can I do
>> this
>> rename via Windows explorer? Which directory are they talking about?
>>
>> 1.. Rename the %WinDir%\System32\Clbcatq.dll file to
>> %WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde (~)
>> at
>> the start of the file name.
>> TIA
>> LAS

>
> %varname% says to resolve the value defined for an environment variable.
> Many envvars are defined by Windows, by apps that modify the PATH, or by
> programs or batch files. You can see what they are by running the
> following in a command shell:
>
> set | more
>
> You are piping the output of the 'set' command to the 'more' command
> which pauses output when it exceeds the window's height. Press the
> Enter key to scroll forward a line at a time, or the Spacebar to page
> forward through the paused listing.
>
> You'll notice that there is an environment variable named "windir" which
> is assigned a non-blank value. When you want to use an environment
> variable's value, you enclose it within percentage signs, so %windir%
> return the value of the environment variable named "windir".



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Old 10-22-2009, 12:30 AM   #8
Jim
Guest
 
Posts: n/a
Default Re: What does %WinDir% mean?


If there is no environment variable called windir on your system, your
system has problems. This variable is the last on the list on mine.
Jim
"Laurel" <FakeMail@Hotmail.com> wrote in message
news:urOW1iqUKHA.4000@TK2MSFTNGP05.phx.gbl...
> Interesting. I think the other folks probably gave me what I needed for
> my original question, but I'd like to know more about set|more. I tried
> it, but found no environment variable associated with WINDIR. The last
> entries in the alphabetized list were for
> SYSTEMROOT,TEMP,TMP,USERDNSDOMAIN,USERDOMAIN,USERN AME,USERPROFILE,
> USDEFLOGDIR and then
> Protection
> BLASTER.
>
> Perhaps there really is no WINDIR variable, and it's just a convention to
> use environmental variable syntax?
>
> "VanguardLH" <V@nguard.LH> wrote in message
> news:hbnmpf$2fn$1@news.albasani.net...
>> Laurel wrote:
>>
>>> I got the following instructions from an MS web page for cleaning up the
>>> COM+ registry. I don't understand the %Windir% convention. Can I do
>>> this
>>> rename via Windows explorer? Which directory are they talking about?
>>>
>>> 1.. Rename the %WinDir%\System32\Clbcatq.dll file to
>>> %WinDir%\System32\~Clbcatq.dll. Make sure that you include the tilde (~)
>>> at
>>> the start of the file name.
>>> TIA
>>> LAS

>>
>> %varname% says to resolve the value defined for an environment variable.
>> Many envvars are defined by Windows, by apps that modify the PATH, or by
>> programs or batch files. You can see what they are by running the
>> following in a command shell:
>>
>> set | more
>>
>> You are piping the output of the 'set' command to the 'more' command
>> which pauses output when it exceeds the window's height. Press the
>> Enter key to scroll forward a line at a time, or the Spacebar to page
>> forward through the paused listing.
>>
>> You'll notice that there is an environment variable named "windir" which
>> is assigned a non-blank value. When you want to use an environment
>> variable's value, you enclose it within percentage signs, so %windir%
>> return the value of the environment variable named "windir".

>
>




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Old 10-22-2009, 03:30 AM   #9
VanguardLH
Guest
 
Posts: n/a
Default Re: What does %WinDir% mean?

Laurel wrote:

> Interesting. I think the other folks probably gave me what I needed for my
> original question, but I'd like to know more about set|more. I tried it,
> but found no environment variable associated with WINDIR. The last entries
> in the alphabetized list were for
> SYSTEMROOT,TEMP,TMP,USERDNSDOMAIN,USERDOMAIN,USERN AME,USERPROFILE,
> USDEFLOGDIR and then
> Protection
> BLASTER.
>
> Perhaps there really is no WINDIR variable, and it's just a convention to
> use environmental variable syntax?


The convention is to use %var% to return (use) the value saved in an
environment variable by that name. If the environment variable is not
define, NUL is returned.

The windir environment variable is created by Windows. It is not one
that is defined by the user or added by a program's install or
configuration. This env var has been defined going back to Windows 3.0;
see http://support.microsoft.com/kb/65662. If the env var is not
defined, some applications will fail that expect to use it to find the
path to OS files (or where they polluted the OS folder in saving files
used by that program). The windir var may not be listed when you look
at them (right-click on My Computer or open the System applet in Control
Panel, Advanced tab, Environment Variables button). If it isn't
defined, Windows creates it when you login.

Some DOS programs are known to set this variable to NUL (which
effectively deletes them). Do you run old DOS programs?

In a command shell, when you run the following command:

echo ---%windir%...

do you see something like "---C:\Windows..." or "---..."? What do you
get for output from running the following command?

set | find "windir"

That runs 'set' to output a list of environment variables which gets
piped into the find command that will list only the output lines that
have "windir" in them. If windir is defined, it will be outputted by
'set' and 'find' should find it and output the matching line which
should look like:

windir=C:\WINDOWS

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Old 10-22-2009, 04:30 PM   #10
Laurel
Guest
 
Posts: n/a
Default Re: What does %WinDir% mean?

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"VanguardLH" <V@nguard.LH> wrote in message
news:hboh1q$8bs$1@news.albasani.net...
> Laurel wrote:
>
>> Interesting. I think the other folks probably gave me what I needed for
>> my
>> original question, but I'd like to know more about set|more. I tried it,
>> but found no environment variable associated with WINDIR. The last
>> entries
>> in the alphabetized list were for
>> SYSTEMROOT,TEMP,TMP,USERDNSDOMAIN,USERDOMAIN,USERN AME,USERPROFILE,
>> USDEFLOGDIR and then
>> Protection
>> BLASTER.
>>
>> Perhaps there really is no WINDIR variable, and it's just a convention to
>> use environmental variable syntax?

>
> The convention is to use %var% to return (use) the value saved in an
> environment variable by that name. If the environment variable is not
> define, NUL is returned.
>
> The windir environment variable is created by Windows. It is not one
> that is defined by the user or added by a program's install or
> configuration. This env var has been defined going back to Windows 3.0;
> see http://support.microsoft.com/kb/65662. If the env var is not
> defined, some applications will fail that expect to use it to find the
> path to OS files (or where they polluted the OS folder in saving files
> used by that program). The windir var may not be listed when you look
> at them (right-click on My Computer or open the System applet in Control
> Panel, Advanced tab, Environment Variables button). If it isn't
> defined, Windows creates it when you login.
>
> Some DOS programs are known to set this variable to NUL (which
> effectively deletes them). Do you run old DOS programs?
>
> In a command shell, when you run the following command:
>
> echo ---%windir%...


I typed exactly what you show above, with dashes and dots. I just get
another directory prompt. In other words, as if I had typed nothing

>
> do you see something like "---C:\Windows..." or "---..."? What do you
> get for output from running the following command?
>
> set | find "windir"


Same things as for echo. As if I had just pressed the enter key.


>
> That runs 'set' to output a list of environment variables which gets
> piped into the find command that will list only the output lines that
> have "windir" in them. If windir is defined, it will be outputted by
> 'set' and 'find' should find it and output the matching line which
> should look like:
>
> windir=C:\WINDOWS
>




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