1,this is migrated from another domain 3 weeks ago
2,this monday morning ,working 3 hours.can not login current domain,also can login system with local admin account.
3,can not check event log by remote.
4,ping the client is ok.
5,re-install os ,it working.
6,the xp is winxp pro sp2.
Pls ahare what is the issue?how can we prevent the issue happen again in future.Thx.