> In XP the setting are File Commit & File Caching the rest don,t exist in XP Client, also set Packet Burst to off.

Done, then rebooted, but problem still exists.

> From prior experience I have had continuing problems with Acer gear until you get the latest Bios, Video, Nic, Motherboard & mouse driver updates, to put it mildly they are a pain in the arse.!!!
> Also there is a high probability that the motherboards are defective.

Some good, of sorts. I've been able to make this error happen on a desktop PC that has WinXP installed. So I now ruled out the TabletPCs and TabletPC WinXP Edition as the cause. Looks like it must be an WinXP thing since NT and 2000 don't have this file delete problem.

One weird tidbit... If I select more than 1 file then delete, it always works.