Thanks for your help, I will tried to find the Q174746 in microsoft, thanks
>>My application log alway full after install exchange 5.5
>>there is the description in the even log for application
>>" MSExchangeIS (226) Unexpected NT API error 0xC000000D"
>>Many thanks for any help!
>I had this same problem today. There is an article in the Microsoft
>Knowledge Base Q174746 that talks about it. Do you have some sort of
>anti-virus software installed? I had Norton Anti-virus for NT installed
>MS Exchange was NOT happy about it!!! (Don't you love having error
>posted in your event log every single second!)
>The fix is to either uninstall your software or to apply the "hotfix" that
>Microsoft has up at their ftp site. The link is on the Knowledge Base
>Hope this helps!