Years ago, I would have said to test every patch on a test machine first. Today, it has gotten much better and patching is almost a non-issue.
You should patch as soon as possible to prevent you server from being compromised.
Unless there are non-standard applications running on the server you're pretty safe.
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by: jebeckhamPosted on 2006-09-21 at 13:41:02ID: 17572774
As a general rule of thumb, you should install all service packs and patches as they are released. Not only do they contain bug fixes, but they also contain security fixes.
What you should also be doing though, before installing updates on your production systems as soon as they are released, is to install and test the patches in a lab environment first. With diligent testing, chances are good that if a patch breaks something in the lab, it's going to break in production and will save you from a lot of grief.
Now it always isn't feasible, depending on hardware, software and staff budget, to perform such testing on all patches that MS releases. You could setup a lab using virtual technology that saves money on hardware and software, but you still have to staff it. If you don't have the staff for a lab either, you're back left with installing directly on your production systems.
In the event that you do have to continue this practice, consider:
Don't install patches immediately. Install them on a regular cycle such as once every 2 weeks or 1 month.
When you DO install patches, make sure that you have a backup of your system first so you can roll-back if necessary.