OK - thanks Gail,

so thats...

1. DBCC CHECKDB

2. DBCC CHECKCATALOG

3. CHECKDB WITH DATA PURITY (Ola Hallengren's SQL Server Integrity Check)

4. UPDATE ALL STATISTICS (Ola Hallengren's SQL Server Index & Statistics Maintenance)

5. DBCC UPDATEUSAGE

No.1 and No.3 seem to be duplicating - could I get away with just running no. 3 first?

thanks,