From 10.3.2223 I have been having various problems on XP Pro SP3, from system lockups when browsing or saving excel (.xls) documents and not this which seems to be along the same line space or RAM.
When I booted today, I got a popup definitions out of date, rather than click the button in the popup I wanted to check what the VPS was. It was 150730-3 only yesterday, not massively out of date and when you consider I'm getting the streaming updates.
I decided to take the advice and did a manual VPS and engine update from the UI - boom - got hit with the 'Not enough storage available to process this command.' I have more available space than I can shake a stick at, almost 40GB in drive C, 52GB on my second partition and much more on my second HDD.
As far as memory goes, I had just over 1gb in use of 4gb installed.