I might add this helped me when I needed it:

If you cannot uninstall, try the following:

1. Go to Start -> Run and type regedit
1a. Find HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{E9F81423-211E-46B6-9AE0-38568BC5CF6F} and delete it.
1b. Find HKEY_CLASSES_ROOT\Installer\Products\32418F9EE1126B64A90E8365B85CFCF6 and delete it

2. Now go to Control Panel -> System -> Hardware -> Device Manager
2a. Under SCSI and RAID controllers delete the key for vax347s (or a347scsi for previous version)
2b. Under System devices delete the Plug and Play BIOS Extension

3. Back in the registry find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services and delete the keys for vax347b and vax347s (or a347bus and a347scsi for previous version) and remove the corresponding files from Windows\system32\drivers
3a. If you're running Win9x, also delete vax347s.pdr (or a347scsi.pdr for previous version) from Windows\System\iosubsys