Earlier I installed windows updates (from the website) which included Windows XP Service Pack 3 (KB936929). During installation (which took a long time) there was a lot of talk about making inventories, backing upfiles and making copies of files. After it'd finished and restarted my computer I found that there was about 2 GB less than a couple of days ago (and I haven't downloaded anything major since then). I decided to restore my computer to the point just before I installed the files. When that had finished the new files were gone but I still had the same amount of space left.
Does it ever happen that sometimes the actual amount of disk space takes some time to register after major downloads/deletions?