If the scan-to function of your networked Brother MFC mysteriously stops working, it may be because of strict firewall settings. The scanner attempts to connect to the Brother ControlCenter software on your PC via a directed UDP connection to your computer. If this is blocked at your computer (by e.g. a firewall), the scan function no longer works.
To resolve, open up port UDP 54925 in your firewall.
For Network PC-FAX, you also have to open port UDP 54926.
Because Google Apps (Gmail) automatically puts a copy of your sent items in the Sent Items folder, it's rather redundant for Outlook to do this as well. Although Google Apps prevents the creation of doubles, it's better to just let Google Apps do it, as it's one less thing to upload (particularly useful on slow connections).
To turn off the copy of sent items in Outlook, turn off the option Save copies of messages in the Sent Items folder. You'll find this in the Outlook options in the Mail tab, section Save messages.
NirnSoft has a useful tool to view, edit, import/export Outlook AutoComplete information.
It can handle all versions of Outlook that support this feature, as well as the the information stored in a message store (be it Exchange or local PST).
Currently, Exchange/Outlook only supports client-side rules if you want to move messages to a specific folder, depending on which alias it's sent to. This means that the rule only works when Outlook is running, which is not always possible.
You can workaround the issue by creating a rule that checks for the content of the message headers. This type of rule can be created server-side and will always run when messages arrive on the Exchange server. By checking whether the alias is present in the message headers, you can easily create a rule that moves those messages to another folder.
When running a Windows 2008 (R1) Terminal Services, and you connect with a RDP 7.1 client and try to shadow another session, it may happen that both clients get disconnected.
KB2523307 tells us that this is caused by RemoteFX being active when a new client is used.
A hotfix is available to address the issue, and can be requested via the KB.
EDIT: for your convenience, I've attached the hotfix (English only!), at least until Microsoft requests its removal...
When using Desktop Slideshow in Windows 7 (a slideshow of desktop backgrounds), you can change the duration of the transition between two images with a registry hack.
You can remove (or manage) links in the Games menu through the registry. The key for this can be found at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\GameUX\Games.
For each entry there's a subkey named a CLSID. When browsing through the list, opening a CLSID reveals the actual title, path and some other settings of that entry. If you want to remove an entry, find the right entry by checking titles and/or paths, then delete that key.
A note of warning I read on the Avast Forums: if your Avast subscription runs out, the Exchange Information Store no longer starts and bails out with an error "failed to start virus scan". Very annoying indeed...