OK - I know SP1 is now out - but in case you havent applied it yet, and arent going too - watch out for these two...

Note - These are supposed to be rolled into SP1, supposed to be!

Issue 1: If your Windows 7 or Windows Server 2008 R2 stops responding at the “Please wait” screen before you are requested to press Ctrl+ALT+DEL.

Lets say you try to start a computer that is running Windows 7 or Windows Server 2008 R2.

However, the operating system stops responding at the “Please wait” screen that appears before you are requested to press Ctrl+ALT+DEL.

Therefore, you cannot log on to your Windows computer.

In such a case download and apply Fix314380 from KB983551.

This issue occurs because an auto-start service remains in the pending mode for too long and cannot start during the Windows startup process. This is caused by a deadlock that occurs because of an interaction between Windows Error Reporting (WER) and AppLocker.

Issue 2: Folder Redirection

If you get a blank desktop or start menu (or both) but you know your folder redirection is working/set up properly... run the following. It clears out the KnownFolders section of the registry which have got broken.

strKeyPath = "CLSID\{031E4825-7B94-4dc3-B131-E946B44C8DD5}"
oReg.DeleteKey HKEY_CLASSES_ROOT, strKeyPath

strKeyPath = "SOFTWARE\Classes\CLSID\{031E4825-7B94-4dc3-B131-E946B44C8DD5}"
oReg.DeleteKey HKEY_LOCAL_MACHINE, strKeyPath

strKeyPath = "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\{031E4825-7B94-4dc3-B131-E946B44C8DD5}"
oReg.DeleteKey HKEY_LOCAL_MACHINE, strKeyPath

strKeyPath = "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{2112AB0A-C86A-4ffe-A368-0DE96E47012E}"
oReg.DeleteKey HKEY_LOCAL_MACHINE, strKeyPath

strKeyPath = "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{491E922F-5643-4af4-A7EB-4E7A138D8174}"
oReg.DeleteKey HKEY_LOCAL_MACHINE, strKeyPath

strKeyPath = "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{7b0db17d-9cd2-4a93-9733-46cc89022e7c}"
oReg.DeleteKey HKEY_LOCAL_MACHINE, strKeyPath

strKeyPath = "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{A302545D-DEFF-464b-ABE8-61C8648D939B}"
oReg.DeleteKey HKEY_LOCAL_MACHINE, strKeyPath

strKeyPath = "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{A990AE9F-A03B-4e80-94BC-9912D7504104}"
oReg.DeleteKey HKEY_LOCAL_MACHINE, strKeyPath

Standard rules apply, YMMV.