Har i oplevet at i ikke kan åbne .exe, .mdb og andre filer i en nyere Outlook dette skyldtes et filter Microsoft har sat ind, man kan dog overstyrer dette filter. Se mere her omkring hvordan i gør.
(Always make a backup before editing the registry.) To use this key:
1. Run Regedit, and go to this key:

HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security (change 10.0 to 9.0 for Outlook 2000 SP3 or to 11.0 for Outlook 2003)
2. Under that key, add a new string value named Level1Remove.
3. For the value for Level1Remove, enter a semicolon-delimited list of file extensions. For example, entering this:

.mdb;.url

would unblock Microsoft Access files and Internet shortcuts. Note that the use of a leading dot was not previously required, however, new security patches may require it. If you are using “mdb;url” format and extensions are blocked, add a dot to each extension. Note also that there is not a space between extensions.