My Vista (Home Premium SP2, 32bit, running on a dual-core Turion64) seems to spend a lot of its time twiddling its thumbs with the infamous spinning circle and "(Not Responding)" applications.
Why? What is it doing!? I assumed it was thrashing, swapping stuff in & out. But frequently it does this when there is little or no disk activity.
E.g. right now I have 8 PDF docs open in Adobe Reader in addition to a number of other apps. I'm trying to search these files and jump from search result to search result -- but almost any action in the Reader search dialog (especially scrolling through the search results) causes Reader to lock up for 10-60 seconds. While Reader is (Not Responding), there is ZERO disk access. Meanwhile Task Manager says only 1.96GB of my 4.0GB (of which I can only access about 3.0 GB) is in use.
Is there anything I can do to improve my system's performance and reduce these hangups?