This step-by-step article describes how to use Iisreset.exe and Task Scheduler to schedule Internet Information Services (IIS) 5.0 and 6.0 to restart.

To schedule IIS to restart on the local computer, follow these steps:

1. Click Start, point to Settings, and then click Control Panel.

2. Double-click Scheduled Tasks.

3. Double-click Add Scheduled Task, and then click Next.

4. Click Browse, navigate to the %SystemRoot%\System32 folder, click Iisreset.exe, and then click Open.

5. Either accept the default name that is displayed in the Type a name for this task box or type the name that you want to use.

6. Under Perform this task, click the interval that you want to use for this task, and then click Next.
7. If you chose to schedule a daily task, a weekly task, a monthly task, or a task that runs only one time in step 6, specify the time and the day when you want the task to run, and then click Next.

8. Type the user name and the password of a user account in which you want to run the task, and then click Next.

This account must be a member of the Administrators group. You must type the user name by using the following format, where domain is the domain name and username is the user account in which you want to schedule the task:

domain\username

9. Click to select the Open advanced properties for this task when I click Finish check box, and then click Finish.

10. Click the Task tab.

11. At the end of the command line that is displayed in the Run box, insert a space, type /restart, and then click OK.

For example, to stop and restart IIS services on the local computer, the command line that is displayed in the Run box should look similar to the following command line, where drive is the drive on which Windows is installed:

drive:\winnt\system32\iisreset.exe /restart

NOTE: You can use other Iisreset.exe parameters in combination with /restart. For example, to restart the computer if an error occurs less than one minute after the Internet services attempt to start, use the /rebootonerror parameter and the /timeout:value parameter. In this scenario, the command line that is displayed in the Run box looks similar to the following command line:
drive:\winnt\system32\iisreset.exe /restart /rebootonerror /timeout:60

Alternatively, if you want to schedule the computer to restart, use the /reboot parameter. In this scenario, the command line that is displayed in the Run box looks similar to the following command line:
drive:\winnt\system32\iisreset.exe /reboot

12. Verify that the new task is displayed in the Scheduled Tasks window, and then close the Scheduled Tasks window.

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Taken from http://www.iisadmin.co.uk/?p=15

Here’s another oddity which I stumbled upon recently whilst working on a 64-bit Windows 2003 machine so I thought I’d share it here.

I installed IIS on a newly installed 64-bit Windows 2003 R2 server and needed to configure it to support Asp.Net 1.1 applications. In order to do this I had to configure IIS to run in 32-bit mode as documented in this KB article How to switch between the 32-bit versions of ASP.NET 1.1 and the 64-bit version of ASP.NET 2.0 on a 64-bit version of Windows.

Once I had done this I went back into the Properties of the Default Web Site and I noticed that the ASP.Net tab seemed to have mysteriously vanished. After closing and re-opening and then checking the MMC a few times I still couldn’t find the ASP.Net tab. So I followed the same procedure on another 64-bit Windows 2003 server and got the same results - the Asp.Net tab disappeared after I configured the Enable32bitAppOnWin64 metabase property.

If you’ve got a 64-bit server you can test this out for yourself by following these steps.

Install IIS 6.0 on the server and then open the Properties of the Default Web Site. You should see the Asp.Net tab as shown here

If you now run the following command at this point :

cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs get W3SVC/AppPools/Enable32bitAppOnWin64

you should see that it returns a value of false as shown below, which shows that IIS is currently running in 64-bit mode.

In order to configure IIS to run in 32-bit mode you need to execute this command :

cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 1

You should now see that it returns a value of True as shown here. This means that IIS is now running in 32-bit mode on your server.

If you then go back to look at the properties of the Default Web Site you will see that the ASP.Net tab has gone.

I have to admit that this had me puzzled at first until I found a reference to this KB article - The “ASP.NET” tab of IIS Manager does not appear when you retrieve the properties for a virtual directory in IIS Manager

Apparently, this anomaly is due to the fact that the 32-bit version of IIS Manager is incompatible with 64-bit machines running Asp.Net

What this means in practical terms is that if you have a 64-bit server running IIS in 32-bit mode and you need to change the version of the .Net framework on a particular web site then you need to use the ASP.NET IIS Registration Tool (Aspnet_regiis.exe) to make those changes.

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