bOOTING

Try this:

Right-click My Computer > Properties > Advanced tab > Settings (in Performance) > Change (in Virtual Memory) > No Paging File > Set > Yes (at warning) > System Managed Size > OK (as many times as needed) > Restart (you'll be prompted to do this).

Problem occurs because an error that needed the recovery disk at one time was resovlved, but the error condition was not cleared. Seen this a lot.

Hope this helps.