I've got a Pentium III 1GHz with Windows 2000 professional. Partition is: FAT32. The problems begun when I connected the HP4400c Scanjet scanner using a USB and installed all the software in the attached HP CD, including the HP precisionscan Pro 3.1. In the first time: Installation was perfect, I could scan few photos using the precisionscan. But after a while, the computer stacked. When I reset the computer it started a disk check. It found few inaccessible files, and ended with a blue screen with some error I didn't wrote on, unfortunately. It happened also after I disconnected the scanner. After few times I didn't get the blue screen anymore, it just didn't complete the disk check... However, I could skip the disk check and login. So I uninstalled all the HP software, and then installed Norton Utilities and solved all the disk errors. Most of those errors were of Entirely Inaccessible folders or Bad Cluster. In that stage, I wasn't sure the problems have any connection to the scanner... So, I installed the HP software again and reconnected the scanner. This time, during the first scan I did using the HP precisionscan, the computer get stacked again. After a reset it started a disk check with the following message: STOP: 0x0000007A (0xc02fff0c, 0xbffc36b4, 0x18f0e860) KERNEL_DATA_IN_PAGE_ERROR Address bffc36b4 BASE AT bffbb000, Date stamp 38399b37 - ftdisk.sys Beginning dump of physical disk. after a while, I've got a blue screen with the following message: STOP: c000021a Unknown Hard Error When I tried to skip the disk check, it couldn't log in and asked for system CD. I didn't try it yet. 2 Questions: ============ - How could I login to the W2K and save the disk, using the system disk? - How could I fix the problem caused by the HP4400c Scanjet? Are there any updates to W2K or to HP4400c drivers or software? Is it a known problem? Thank You Very Much!