Tell you how to resolve Oracle 10g EM login problem: The database status is currently unavailable.

Envirement:  windows XP,   oracle 10g

Problem:    when I  open the EM browser, it shows that: "The database status is currently unavailable. It is possible that the database is in mount or nomount state..."  then I go to start up, I input the OS and database account and pw, but whatever what I input it always said my pw is wrong .

Solution: after some hours sad, I turn to goole's help. I found there were many users meeting the same problem with me.

 First , I got the answer:  Go to Control Panel-->Administrative Tools-->Local Security Policy-->Local Policies-->User Rights Assignment-->U will see in the policy as "Log on as a batch Job-->right click-->Properties-->add user or groups-->give your OS username.

after that, I wen to the EM console, now it didn't prompt the wrong password, but you still don't know how to login the EM console.

then I spent another time to find it out. Someone said , cann't use the number as the beginning of the sysman and dbsnmp's password, tis is unviarable. yeah, I remmembered of that when I create the database, it prompted me that the password is invalid, it prompted twice. So I draw this guy's lesson, I deleted the db and create it again. this time I use the character as the beginning of the password. ok, wait for the db's building. after that , then create listener and net serviece name. all done. I open the EM browser, yeah! it successes this time!!!

althougth it seems easy, but I really spend much to resolve this problem, anyway, I figure out it. I get . So , sometimes , diffculty is good for you.