Can’t start MS Word 2000

I have Dell computer, 667 Mhz, Ram 32Mb, operating system is Windows 98. Few days ago it became impossible to start MS Word 2000 – every time computer is freezing and I have to restart it.I uninstalled MS Word, cleaned registry by using RegClean program and installed MS Word 2000 again, the same problem. I don’t have any problem with other Office 2000 applications, Excel, Power Point, MS Outlook run weel without any problems. Only MS Word 2000 causes the problem.I added more RAM, now it has 160Mb of RAM – no rezult. I have Norton Antivirus installed on this computer, but virus definitiond are very old, more than two years. Is it a virus or do I have to increase swap file size or do something else. Any other ideas?