Fix Missing CD or DVD drive

This is a common problem, and Microsoft has a KB article 314060 describing how to fix it.

Microsoft has release a tool available here, or to manually fix this follow the following instructions from the knowledge base article.

Microsoft Windows Vista

1. Click Start, and then click All Programs.
2. Click Accessories, and then click Run.
3. Type regedit, and then click OK.
   If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
4. In the navigation pane, locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
5. In the right pane, click UpperFilters.
   
   Note You may also see an UpperFilters.bak registry entry. You do not have to remove that entry. Click UpperFilters only. If you do not see the UpperFilters registry entry, you still might have to remove the LowerFilters registry entry. To do this, go to step 8.
   
   
6. On the Edit menu, click Delete.
   
7. When you are prompted to confirm the deletion, click Yes.
8. In the right pane, click LowerFilters.
   
9. On the Edit menu, click Delete.
10. When you are prompted to confirm the deletion, click Yes.
11. Exit Registry Editor.
12. Restart the computer.
    

Microsoft Windows XP

1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. In the navigation pane, locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
4. In the right pane, click UpperFilters.
   
   Note You may also see an UpperFilters.bak registry entry. You do not have to remove that entry. Click UpperFilters only. If you do not see the UpperFilters registry entry, you still might have to remove the LowerFilters registry entry. To do this, go to step 7.
   
   
5. On the Edit menu, click Delete.
6. When you are prompted to confirm the deletion, click Yes.
7. In the right pane, click LowerFilters.
   
8. On the Edit menu, click Delete.
9. When you are prompted to confirm the deletion, click Yes.
10. Exit Registry Editor.
11. Restart the computer.

How to test an SMTP server with Telnet.

1. Open a command window.
Start --> Run --> cmd

2. Telnet into the SMTP server on port 25.
telnet (servername) 25

3. Test the SMTP connection by manually sending an email by entering the following command sequence.

helo (your domain name)(enter)
response = 250 OK

mail from:(your Email Address)(enter)
response = 250 OK - mail from "your Email address"

rcpt to:(recipient address)(enter)
response = 250 OK - Recipient "recipient address"

data(enter)
response = 354 Send data. End with CRLF.CRLF

To:(recipient's display name)(enter)
From:(your display name)(enter)
Subject:(Subject field of Email message)(enter)
(Enter you body text)(enter)(enter).(enter)
response should be as follows
250 OK

quit(enter)

If you can successfully complete the previous steps, SMTP communications between your computer and the server are working.

Enable remote desktop on a workstation from a domain controller.

On a domain with administrative rights you can use remote registry to enable remote desktop on a domain controller workstation.

1. Open regedit on a member computer or server.

2. On the file menu select "connect to remote registry".

3. Enter the computer name you want to enable remote desktop on.

4. Navigate to the following registry branch:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server

5. Find the fDenyTSConnections key and change it to decimal 0

That's it, sometimes you have try to connect twice before it works.

You could also manage the computer remotely and add users to the Remote Desktop Users Group.