Thank you I thought it was not normal... But as I have found lots of things that seem not normal I wanted to ask. I removed all Alienware and Dell software installed on system, rebooted and reinstalled all the software. then setup SupportAssit profile and it all working.  
Drives& Downloads Scan (Manual) - No updates available - Error - No updates available Please try again later or use the link below to find drivers by Service Tag or see a list of drivers available for your product.   So my question is is this normal that if no updates are available it gives an error?
Support Assist Errors and Driver detection not available