JaW

There was no filter drivers. The USB disk drive was properly discovered by XP as "local disk" (non-removable drive), device class {4D36E967-E325-11CE-BFC1-08002BE10318} (location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}) but it appear as "removable drive". Device class for USB removable drives is {36FC9E60-C465-11CF-8056-444553540000} (location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056-444553540000}). What is more, the USB disk drive was unable to spin down (normally it stops after 5 minutes). No warnings in Device Manager or so. P.S. If You want to now, I also have checked "cfadisk.sys" with memory card reader and problem was the same: device class was {4D36E967-E325-11CE-BFC1-08002BE10318}, while memory card was shown as removable in "My Computer". I just aware from deleting default video drivers while sliming down XP for ThinkPad X40/X41 machines.

Hi, ThinkPad X41 (machine type 2526) utilize Intel i900 GMA platform, Win XP Pro SP3. Other i900 and i855 systems are also very likely to have similar problems. Scenario 1: Removing both old and default video drivers (without integration video drivers) -> BSOD Scenario 2: Removing both old and default video drivers plus integrating latest video drivers -> BSOD (if I remember - BAD_POOL_CALLER 0x0000002c). Scenario 3: Removing only default video drivers plus integrating latest video drivers -> faulty handling removable media bit in USB portable drives, that is really unpleasant if have more than one partition on it, because XP can see only first partition on removable devices. Very bad to be discovered late. Scenario 4: Leaving both old and default video drivers plus integrating latest video drivers -> no more troubles. Perhaps integration chipset files in Scenario 3 will be proper solution, but I don't want to spend more time only to check such option. Hope this could be helpful somehow. JaW