SBS 2003 server in big trouble after a Peachtree & Quickbooks Installation

The MAPI call 'OpenMsgStore' failed with the following error: 
The Microsoft Exchange Server computer is not available.  Either there are network problems or the Microsoft Exchange Server computer is down for maintenance.
The MAPI provider failed.
Microsoft Exchange Server Information Store
ID no: 8004011d-0526-00000000 
 
Error initializing session for virtual machine PDC01. The error number is 0x8004011d. Make sure Microsoft Exchange Store is running. 
 
Information Store (5292) First Storage Group: An attempt to open the file "C:\Program Files\Exchsrvr\mdbdata\pub1.edb" for read only access failed with system error 5 (0x00000005): "Access is denied. ".  The open file operation will fail with error -1032 (0xfffffbf8). 
 
Error 0xfffffbf8 starting Storage Group /DC=local/DC=deangelocpa/CN=Configuration/CN=Services/CN=Microsoft Exchange/CN=First Organization/CN=Administrative Groups/CN=first administrative group/CN=Servers/CN=PDC01/CN=InformationStore/CN=First Storage Group on the Microsoft Exchange Information Store. 
<NULL>. 
 
A provider, PerfProv, has been registered in the WMI namespace, ROOT\CIMV2\MicrosoftHealthMonitor\PerfMon, but did not specify the HostingModel property.  This provider will be run using the LocalSystem account.  This account is privileged and the provider may cause a security violation if it does not correctly impersonate user requests.  Ensure that provider has been reviewed for security behavior and update the HostingModel property of the provider registration to an account with the least privileges possible for the required functionality.   
 
For more information, see Help and Support Center at 
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Error initializing session for virtual machine PDC01. The error number is 0x8004011d. Make sure Microsoft Exchange Store is running. 
 
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Verify that the Microsoft Exchange MTA service has started. Consecutive ma-open calls are failing with error 3051. 
 
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The Peachtree SmartPosting 2009 service terminated unexpectedly.  It has done this 267 time(s).  The following corrective action will be taken in 0 milliseconds: Restart the service.
 
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The description for Event ID ( 1 ) in Source ( SQLANY 10.0 ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: QuickBooksDB19, Starting service QuickBooksDB19.
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A fatal error occurred either while synchronizing the Update Services computer groups with Group Policy or while moving the Unassigned Computers group. To see a detailed log, create a file called SyncSecurity.Log in %SBSProgramDir%\Support, and then run SyncSecurity.exe again. The error returned was: Cannot start service wsusservice on computer '.'.
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MS DTC started with the following settings (OFF = 0 and ON = 1):
 
  Security Configuration:
      Network Administration of Transactions = 0,
      Network Clients = 0,
      Inbound Distributed Transactions using Native MSDTC Protocol = 0,
      Outbound Distributed Transactions using Native MSDTC Protocol = 0,
      Transaction Internet Protocol (TIP) = 0,
      XA Transactions = 0
  Filtering Duplicate events = 1
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MS DTC could not correctly process a DC Promotion/Demotion event. MS DTC will continue to function and will use the existing security settings. Error Specifics: %1
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MS DTC could not correctly process a DC Promotion/Demotion event. MS DTC will continue to function and will use the existing security settings. Error Specifics: d:\nt\com\complus\dtc\dtc\adme\uiname.cpp:9280, Pid: 1900
No Callstack,
 CmdLine: C:\WINDOWS\system32\msdtc.exe
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MS DTC has detected that a DC Promotion has happened since the last time the MS DTC service was started.
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