MS SQl server 2008(Microsoft SQL Server Express Edition with Advanced Services (64-bit) , version - 10.0.2531.0) suddenly becomes slow and all the programes using the server gets stuck. After few mintues server becomes absolutely all right.
Operating System Used is "Windows server 2003 R2 stndrd x64 Edition SP2"(Microsoft Windows NT 5.2 (3790) and Platform - NT x64)

Can anyone help on this?!