Applies to:

Windows Vista Service Pack 2

Windows Vista SP2

Note: You should check http://support.microsoft.com for the latest version of the different files.

List of slow startup and logon related hotfixes post SP2 for Windows Vista SP2 as of Dec 2011:

2581608 Logon scripts take a long time to run in Windows Vista, in Windows Server 2008, in Windows 7 or in Windows Server 2008 R2
http://support.microsoft.com/?id=2581608

Update(s):
Gpapi.dll 6.0.6002.22679
Gpsvc.dll 6.0.6002.22679

2430683 A UEFI-enabled computer stops responding at a black screen in the startup process in Windows Vista or in Windows 2008
http://support.microsoft.com/?id=2430683

Update(s):

Setbcdlocale.dll 6.0.6002.22497
Winload.exe 6.0.6002.22497
Winresume.exe 6.0.6002.22497
Winload.exe 6.0.6002.22497
Winresume.exe 6.0.6002.22497

2379016 A computer that is running Windows Vista or Windows Server 2008 stops responding and hangs at the "Applying User Settings" stage of the logon process
http://support.microsoft.com/id=2379016

Update(s):
Httpapi.dll 6.0.6002.22490
Http.sys 6.0.6002.22490

969972 You encounter a slow application startup or a slow logon on a computer that is running Windows Server 2008 or Windows Vista after you apply software restriction policies

http://support.microsoft.com/?id=969972

Update(s):
Advapi32.dll 6.0.6002.22134