Thanks
tempdb.mdf and templog.ldf files is located on my C drive as below.
C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS2008\MSSQL\DATA
I have 10gig free space on C drive and I have 3 gig RAM on my computer.
So I don't understand, why is the problem creating tempdb.mdf
I would appreciate your help.
Many thanks