Hello, monk1989, and welcome to Techspot :wave:
Please take a moment to read the following threads to make your experience here as enjoyable as possible :)
Message for all newcomers (
http://www.techspot.com/vb/topic93387.html)
SNGX1275's Guide to making a good post/thread (
http://www.techspot.com/vb/topic33297.html)
The Techspot FAQ (
http://www.techspot.com/extras/forum_guidelines/faq.shtml)
If you could take a minute to fill in some of your profile information (
http://www.techspot.com/vb/profile.php?do=editprofile) that would be helpful to all members of the forum :)
Knowing someone's location in the world can be extremely helpful, even if you just put a country.
Also remember to post any problems or questions that you have in the appropriate forums (
http://www.techspot.com/vb/)
With regards to your problem, here is some
info on NDIS.sys (http://www.file.net/process/ndis.sys.html). Because it belongs to Windows, try running a Repair install.
How to repair Windows XP/2000 if you are unable to boot into Windows (
http://www.techspot.com/vb/topic8356.html)