"Mark all as old" Problem

[venkal]

You need to use at least one time "Mark all as old" to be able to use the command "New topics since last marking as old"

What does this require? How to?

 

[venkal]

Well, if there is any one see this, I need help, Windows 7 (32 bit) and Word and MSN launches without responding or the Word office shut down suddenly, there is no virus as I checked. And my PC: duo core e7400 @2.80Ghz, 2.00 GB. I want to know what is going on with the word office and MSN? other programs keep working well.