The following links lead directly to the help page, discussion forum or whatever at the microsoft site. Or you can go to the support start page and search from there. Just about any Outlook Express difficulty can be solved, if you have good information, right? These should help.
There is enough stuff here to make Outlook Express get up and dance ;o) Assuming you would want it to...
NOTE: I stopped using Outlook over a year ago - (switched to Thunderbird - a much better email program)... if you can't find the help you need here, contact Microsoft support - don't email me, I don't remember the program well enough to help.