Hi,
I found the solution to this extremely common problem with my ScanJet 4300C (that is, PrecisionScan LTX v. 1.1 hanging on start under Windows XP/2000). The key is HP's document:
http://h10025.www1.hp.com/ewfrf/wc/docum...ocname=bps05156
My problem was having a link to My Computer in my Start menu. As the software scans through the entire Start menu each time it runs, looking for compatible programs to scan to, it was trying to look through my entire computer (both hard drives and 4 network drives).
I simply removed the My Computer link from my Start menu and PrecisionScan LTX began working correctly. You may need to remove other links, but any links in your Start menu that connect directly to My Computer, a hard drive, or a network location will probably cause the same problem.
I hope that helps.