Exchange Server 2010 “The Certificate is Invalid for Exchange Server Usage” Error

A certificate installed on an Exchange Server 2010 server may display the following error message.

The certificate is invalid for exchange server usage

This can occur when the certificate cannot be verified to a trusted certificate authority.  This may occur when the certificate has been issued by a private certificate authority.
To correct the problem you must install the root certificate for the certificate authority.  For a private certificate authority this can be obtained from the web enrollment page (eg http://ca-server/certsrv).
Browse to the web page and click on Download a CA Certificate, Certificate Chain, or CRL.
Click to download either the CA Certificate (if the certificate was issued by a root CA) or the Certificate Chain (if the certificate was issued by an intermediary CA).

Launch a new Microsoft Management Console (Start -> Run, mmc.exe) and add the Certificates snap-in to it, connecting to the Computer Account for the Local Computer.
Navigate to Trusted Root Certification Authorities.  Right-click on Certificates and choose All Tasks and then Import.

Browse and choose the CA Certificate or Certificate Chain that you downloaded earlier.

Place the certificate in the Trusted Root Certification Authorities store.

Complete the import wizard and then refresh the Exchange Management Console, and the certificate should now be valid.






Source :

http://exchangeserverpro.com/exchange-server-2010-certificate-invalid-for-exchange-server-usage-error 

Print Spooler Is Not Running

Start computer in safe mode
Start the computer in safe mode so that you can remove spool files. To do this, follow these steps:

   1. Restart your computer and start pressing the F8 key on your keyboard. On a computer that is configured to start multiple operating systems, you can press the F8 key when the Boot menu appears.
   2. Select Safe Mode when the Windows Advanced Options menu appears, and then press ENTER.
   3. If the Boot menu appears again and you are prompted to select the operating system on the computer, use the arrow keys to select the operating system, and then press ENTER.

      Note For more information about how to start your computer in safe mode, click Start, click Help and Support, type safe mode in the Search box, press the ENTER key, and then click the Start Windows in safe mode topic.

Back to the top
Now delete spool printer and driver files
In safe mode, delete the spool printer and driver files. To do this, start Microsoft Windows Explorer, and then delete all the files and the folders in the following two folders (where C: is the drive where you have Windows XP installed):

    * C:\Windows\System32\Spool\Printers
    * C:\Windows\System32\Spool\Drivers\w32x86

Back to the top
Next, edit the registry
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
First, remove Windows NT subkeys
Remove the potentially problematic registry entries for Windows NT x86 service subkeys. These may have been installed by third-party printer setup programs and may be interfering with the print spool service. Use the following steps to keep the drivers, print spools, and registry entries that came with Windows on your computer and remove all others that may be causing issues.

   1. Start Registry Editor. To do this, click Start, click Run, type regedit in the Open box, and then click OK.
   2. Locate and expand the following registry key:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows NT x86
      View the list of subkeys (subfolders). There should only be the following subkeys:
          * Drivers
          * Print Processors
   3. If there are any subkeys other than the subkeys that are listed in step 2, follow these steps:
         1. On the File menu, click Export.
         2. In the File Name box, type the name that you want to use for this key, such as WindowsNTx86regkey, and then click Save.

            NoteYou can use this backup of the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows NT x86 registry key to restore the key if you experience any issues after you complete this procedure.
         3. Delete all the subkeys other than the subkeys that are listed in step 2. To do this, right-click each subkey that is not on the list, and then click Delete. Click Yes when you are prompted to confirm the deletion.

Second, remove registry entries for printer drivers
Remove the potentially problematic printer driver subkeys, which may be interfering with the printer you want to use. These may have been installed by third-party printer setup programs. Use the following steps to keep the printer driver and registry entries that came with Windows on your computer and remove all others that may be causing issues.

   1. Start Registry Editor if it is not open. To do this, click Start, click Run, type regedit in the Open box, and then click OK.
   2. Locate and then expand the following registry key:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows NT x86\Drivers
      The registry entries for the printer drivers that are installed on the computer are stored in the Version-x subkey or subkeys, where x is a number (typically 2 or 3).
   3. Export the Version-x subkey or subkeys. To do this, follow these steps:
         1. On the File menu, click Export.
         2. In the File Name box, type the name that you want to use for this key, such as print driver, and then click Save.
   4. Expand the Version-x subkey or subkeys, and then delete the printer driver entries. To do this, right-click each printer driver subkey, and then click Delete. Click Yes when you are prompted to confirm the deletion.

Third, remove registry entries for default print monitors
Remove the potentially problematic print monitor subkeys, which may be interfering with the printer you want to use. These may have been installed by third-party printer setup programs. Use the following steps to keep the print monitors and registry entries that came with Windows and remove all others that may be causing issues.

   1. Start Registry Editor if it is not open. To do this, click Start, click Run, type regedit in the Open box, and then click OK.
   2. Locate and then expand the following registry key:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Monitors
      View the list of subkeys. There should only be the following subkeys for the default print monitors:
          * BJ Language Monitor
          * Local Port
          * PJL Language Monitor
          * Standard TCP/IP Port
          * USB Monitor
   3. If there are any subkeys other than the subkeys that are listed in step 1, follow these steps:
         1. On the File menu, click Export.
         2. In the File Name box, type the name that you want to use for this key, such as MonitorsRegkey, and then click Save.

            NoteYou can use this backup of the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Monitors registry key to restore the key if you experience any issues after you complete this procedure.
         3. Delete all the subkeys other than the subkeys that are listed in step 2. To do this, right-click each subkey that is not on the list, and then click Delete. Click Yes when you are prompted to confirm the deletion.
   4. Exit Registry Editor.
   5. If you have a printer attached to the computer, disconnect the printer cable from the computer, and then restart the computer.

Back to the top
Now verify that the print spooler service is running
Verify that the print spooler service is running. To do this, follow these steps:

   1. Click Start, right-click My Computer, and then click Manage.
   2. Expand Services and Applications, and then click Services.
   3. In the details pane, right-click the Print Spooler service, and then click Start (if it is stopped).
   4. Exit Computer Management.

If you cannot start the Print Spooler service, follow the steps in the following Microsoft Knowledge Base article to start the Print Spooler service:
919750  (http://support.microsoft.com/kb/919750/ ) You experience problems printing, viewing printer icons, and adding printers, the Print Spooler service does not function correctly, and you receive print-related error messages on a Windows XP-based computer
Back to the top
Finally, add a printer and print a test page
If you have a printer attached, reconnect the printer cable to the computer, install the printer by adding it to the computer through the Add Printer Wizard, and then try to print a test page. To install the printer you want, follow these steps:

   1. Click Start, and then click Printers and Faxes.
   2. Click Add a printer. The Add Printer Wizard starts.
   3. Follow the instructions in the Add Printer Wizard to install the printer that you want.
   4. Print a test page to make sure that you can print.

If you still cannot print or if you are still receiving print spool errors, go to the "Did this fix the problem?" section.

Enabling 3GB switch on Windows Vista™, Windows 7 or Windows XP

Issue

You want to make more memory available to your Autodesk application by enable the 3GB switch on your 32 bit version of Windows Vista™, Windows 7 or Windows XP operating systems.

While the 3GB switch may be a useful tool that allows you to access more memory for your Autodesk application, it should be mentioned that not all Windows updates or hardware and graphics drivers work well, or at all, with the 3GB switch enabled.  In fact, some limitations may even apply to certain features that ship with your Autodesk application. 

If you experience any unexpected or abnormal behavior with the 3GB switch enabled, we recommend that you disable it and move to a 64 bit application.

Note: Inventor users should reference this link from the Inventor WikiHelp regarding the limitations of the 3GB switch.

Solution

To enable the 3GB switch on Windows Vista™ or Windows 7:

1.    Right-click Command Prompt in the Accessories program group of the Start menu. Click Run as Administrator.

2.    At the command prompt, enter "bcdedit /set IncreaseUserVa 3072"

3.    Restart the computer.

To disable the 3GB switch:

1.    Right-click on Command Prompt in the Accessories program group of the Start menu. Click Run as Administrator.

2.    At the command prompt, enter "bcdedit /deletevalue IncreaseUserVa"

3.    Restart the computer.

To enable the 3GB switch on Windows XP:

1.    Right-click My Computer. Click Properties.

2.    In the System Properties dialog box, click the Advanced tab.

3.    On the Advanced tab, under Startup and Recovery, click Settings.

4.    In the Startup and Recovery dialog box, under System startup, click Edit. The Windows boot.ini file will be opened in Microsoft® Notepad.

5.    Create a backup copy of the boot.ini file. Note: Boot.ini files may vary from computer to computer.

6.    Select the following line in the boot.ini file:

multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP Professional" /fastdetect

7.    Press Ctrl+C to copy the line and then press Ctrl+V to paste it immediately below the original line.

Note: Your text string may be different from the text string in this solution, so be sure to copy the text string from your boot.ini file, and not the text string included here.

8.    Modify the copied line to include “ /3GB”, as shown in the following example:

multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP Professional 3GB" /3GB /fastdetect

Note: Do not overwrite any existing lines.

9.    Save and close the boot.ini file.

10.  Click OK to close each dialog box.

11.  Restart your computer.

12.  During startup, select the 3GB option. If you do not select the 3GB option, the system will default to the 2GB total memory setting.

Note: If problems occur during startup, you may try to resolve the issue by updating some of your drivers.  However, recall the notice at the beginning of this solutions that note all Windows update or hardware and graphics drivers work with the 3GB switch enabled.

For more information on the 3GB switch, refer to the following Microsoft MSDN article:

http://msdn.microsoft.com/en-us/library/ff556232.aspx