I had a similar problem, an easy way to fix it is-
Open start>run>then type in "sysedit" click ok>it should open the System Configuration
Editor,select the window "AUTOEXEC.BAT" and delete the line containing the text "MSCDEX"
The line will look something like the following.
LH C:\Windows\Command\MSCDEX.EXE /D:MSCD000
go file>save and reboot your computer and the problem should be solved. :)