Here’s how to run a quick performance monitor check on your Vista machine.
Go to the orb, and type in perf in the Search box
Choose the Reliability and Performance Monitor application. When it opens, click the Reliability Monitor option.
In the timeline on the right you can now click on any of the events to see what happened on your machine, be it a software update, application crash, etc.
Great for working out what may have changed recently on your machine, if it suddenly starts playing up.