Microsoft Baseline Security Analyzer (MBSA) is a tool designed by Microsoft for IT professionals, Usually for small to medium sized businesses however it can be used by anyone to check they have the latest security in place on your system and not just that, it will alert you to any misconfigurations and give you guidance. If you would like to read more about this tool before downloading then start here.
This tutorial is for you if you want to make sure that your computer is completely up to date with all the security features that are available, or maybe if your just slightly paranoid with computers 
At the time of writing this post Microsoft Baseline Security Analyzer is on Version 2.1, Which supports the following systems:
Windows 2000 Service Pack 4
Windows Server 2003
Windows Server 2008
Windows Vista
Windows XP
There are both x32 and x64 editions of the program, you should note however on the download page that x64 is as you guessed it for 64 bit but the other option you have is x86 don’t be confused by this x86 is for x32 bit systems. Which is most cases is the one you will require as a home user, if you don’t understand this and are unsure which you have then it’s no doubt going to be x86 for you.
Once you download and install the program you going to want to run it, so here’s a quick run over what you should do:
For the sake of this tutorial we are just going to be scanning your computer, if you are more experienced then go ahead and play on your own now 
Open Microsoft Baseline Security Analyzer 2.1 (there should be a shortcut icon on your desktop).
Click Scan a computer.
Now leave all the boxes as they are and Click Start Scan.
The program my download updates here before it continues ( it can take a while ).
Once the scan is completed you will be displayed with Report details for the computer you scanned, what we are more interested in here is downloading whats missing and making our computers more secure.
Now that you have scanned your computer and it’s displaying the results to your in the table, what you need to pay close attention to is Result field in the table, in this table you will want to click on the little blue link that says Result Details.
This will open a new window and give you download links to the updates you are missing for that program, if you look to the right you’ll seed a download field displaying images of little drives with red arrows above them. To download the update simply click on these images and your download will start.
I’m sure you understand what to do from here, download all the updates that you are missing and install them on your system once you have done this scan again and you’ll be safe in the knowledge that your computer is up to date will all the latest security updates.
Some of the results that you are given will not be for updates they will be for things such as the Guest account is active on your computer and needs to be disabled to make your system more secure for items such as this you will want to Click the litte blue link that says How to correct this which will open a browser window and take you to the information you need.
I hope this has helped you keep your system more secure, if I have missed anything out or you are unsure about anything let me know in the comments below and I’ll do my best to solve the issue.
