corruption in Windows 98 and Word 2000

System has AMD 400MHz, 64MB RAM, 8GB hard disk. When I load Word 2000 (part of Works Suite 2001, the screen freezes on the loading screen. I installed Word from Office 2000, repaired it but no difference. I installed and ran Registry Mechanic whch fixed many problems, but not this one. I uninstalled Works Suite and Word and reinstalled. I uninstalled Norton Antivirus and installed the free AVG 7.0, updated and scanned, nothing found. I updated Ad-Aware 6.0 and scanned, nothing serious found other than Data Miners. I installed CounterSpy updated and scanned, but only a bad cookie which was deleted. I installed Wintasks Pro, which uncovered nothing sinister. What can I do please?