Condition: After logon immediately following boot-up, a message prompt appears informing you to compact the Outlook Express message store and includes a button to trigger the routine.
Perhaps your users don’t use Outlook Express but in this case it won’t matter. Lately I’ve experienced a large amount of occurrences of this annoyance on XP SP3 desktops. For some unknown root cause there is an Outlook Express counter that is suddenly getting triggered upon reaching an open/close limit (100) although it isn’t being opened or closed ever. There are various reported programs that due to indexing are believed to sufficient trip the counter. Windows Desktop Search is one of these. With this app’s ‘Options’, Outlook Express indexing can be manually unchecked; however, still messages continue to appear unabated.
Fortunately I discovered a solution that ends the madness. The only caveat is that it will permanently disable the counter from ever working. I’d rather recommend Windows Live Mail over Outlook Express anyway.
Simply altering the Windows Registry to set this counter to 0 will buy you a little time until it reaches 100 again (the limit). Instead if you completely remove that subkey it stays gone and so do the messages. Normal precautions and warnings to editing the registry apply.
Here’s where: HKEY_CURRENT_USER\Identities\{GUID}\Software\Microsoft\Outlook Express\5.0 ->Compact Check Count
…and of course you can just remove Outlook Express altogether via Add/Remove -> Windows Components
****note: to be clear as pointed out by Jim in the comments, if you do run Outlook Express again, then this key will get recreated.****