XP uses PAGEFILE.SYS as the swap file for the RAM. HIBERFILE.SYS is to store the system as it was when it enters the sleep mode. Each should be cleared and re-started/re-sized automatically upon shut-down and re-start. You can adjust the pagefile size by right-clicking on My Computer and selecting properties>select the Advanced tab, select Settings, select the Advanced tab, press Change button under Virtual memory. Here you can change the size of the pagefile - MS recommends the XP-managed size.
I have a 465 GB Seagate Freecom external drive which is showing only 90 GB free. When I highlight the files shown on the disk and click properties the total is 104 GB. I seem to be missing 271 GB. There are 25 in the recycle bin which ought perhaps to be deducted from this, leaving a missing 246 GB. I have asked disk clean up to dump all but one restore point - as suggested in earlier posts - but this makes no difference. I haven't been able to track down the cacls command line as also suggested. Any advice would be much appreciated.
I have Windows 7 Pro on an Acer Timeline laptop.
Thanks WyomingKnott - this has revealed a mass of backups which I should perhaps have known about but were hidden when I just clicked on the drive in My Computer.
A few deletions and respectability has been restored. Most grateful.