How to install Windows Server 2008 without activating it

1. Run the Windows Server 2008 Setup program.
2. When you are prompted to enter a product key for activation, do not enter a key. Click No when Setup asks you to confirm your selection.
3. You may be prompted to select the edition of Windows Server 2008 that you want to evaluate. Select the edition that you want to install. 
   
   Note After Windows Server 2008 is installed, the edition cannot be changed without reinstalling it.
4. When you are prompted, read the evaluation terms in the Microsoft Software License Terms, and then accept the terms.
5. When the Windows Server 2008 Setup program is finished, your initial 60-day evaluation period starts. To check the time that is left on your current evaluation period, run the Slmgr.vbs script that is in the System32 folder. Use the -dli switch to run this script. The slmgr.vbs -dli command displays the number of days that are left in the current 60-day evaluation period.

How to manually extend the evaluation period

1. Click Start, and then click Command Prompt.
2. Type slmgr.vbs -dli, and then press ENTER to check the current status of your evaluation period.
3. To reset the evaluation period, type slmgr.vbs –rearm, and then press ENTER.
4. Restart the computer.

How to automate the extension of the evaluation period

1. Click Start, point to Administrative Tools, and then click Task Scheduler.
2. Copy the following sample task to the server, and then save it as an .xml file. For example, you can save the file asExtend.xml.

   <?xml version="1.0" encoding="UTF-16"?>
   <Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
     <RegistrationInfo>
       <Date>2007-09-17T14:26:04.433</Date>
       <Author>Microsoft Corporation</Author>
     </RegistrationInfo>
     <Triggers>
       <TimeTrigger id="18c4a453-d7aa-4647-916b-af0c3ea16a6b">
         <Repetition>
           <Interval>P31D</Interval>
           <StopAtDurationEnd>false</StopAtDurationEnd>
         </Repetition>
         <StartBoundary>2007-10-05T02:23:24</StartBoundary>
         <EndBoundary>2008-09-17T14:23:24.777</EndBoundary>
         <Enabled>true</Enabled>
       </TimeTrigger>
     </Triggers>
     <Principals>
       <Principal id="Author">
         <UserId>domain\alias</UserId>
         <LogonType>Password</LogonType>
         <RunLevel>HighestAvailable</RunLevel>
       </Principal>
     </Principals>
     <Settings>
       <IdleSettings>
         <Duration>PT10M</Duration>
         <WaitTimeout>PT1H</WaitTimeout>
         <StopOnIdleEnd>true</StopOnIdleEnd>
         <RestartOnIdle>false</RestartOnIdle>
       </IdleSettings>
       <MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
       <DisallowStartIfOnBatteries>true</DisallowStartIfOnBatteries>
       <StopIfGoingOnBatteries>true</StopIfGoingOnBatteries>
       <AllowHardTerminate>true</AllowHardTerminate>
       <StartWhenAvailable>false</StartWhenAvailable>
       <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
       <AllowStartOnDemand>true</AllowStartOnDemand>
       <Enabled>true</Enabled>
       <Hidden>false</Hidden>
       <RunOnlyIfIdle>false</RunOnlyIfIdle>
       <WakeToRun>true</WakeToRun>
       <ExecutionTimeLimit>P3D</ExecutionTimeLimit>
       <DeleteExpiredTaskAfter>PT0S</DeleteExpiredTaskAfter>
       <Priority>7</Priority>
       <RestartOnFailure>
         <Interval>PT1M</Interval>
         <Count>3</Count>
       </RestartOnFailure>
     </Settings>
     <Actions Context="Author">
       <Exec>
         <Command>C:\Windows\System32\slmgr.vbs</Command>
         <Arguments>-rearm</Arguments>
       </Exec>
       <Exec>
         <Command>C:\Windows\System32\shutdown.exe</Command>
         <Arguments>/r</Arguments>
       </Exec>
     </Actions>
   </Task>
   
   

3. In the sample task, change the value of the following “UserID” tag to contain your domain and your alias:
   <UserId>domain\alias</UserId>
4. In the Task Scheduler, click Import Task on the Action menu.
5. Click the sample task .xml file. For example, click Extend.xml.
6. Click Import.
7. Click the Triggers tab.
8. Click the One Time trigger, and then click Edit.
9. Change the start date of the task to a date just before the end of your current evaluation period.
10. Click OK, and then exit the Task Scheduler.