Vista 64bit won't boot SafeMode stops at aswrvrt.sys

I have a Dell XPS 430 with Vista 64 bit installed. When it boots up it shows the POST then the Windows loading bar then a blank screen. No mouse. No desktop. Nothing.

When I try booting in Safe Mode it stops at aswRvrt.sys.

Thanks for any help. It’s appreciated.

Essexboy is notified, he is in bed now but back online tomorrow

Update to my situation. I found the original boot disk and managed to do a system restore. I then performed a quick scan followed by a boot scan and Avast found nothing.

I’m hoping my problem is resolved but I’m curious what may have caused it to begin with.

There are multiple reasons for this and without knowing where the problem was it is hard to say