Windrive

I have the usual floppy A, C drive and D drive for CD rom. but somehow I now have an E drive, called Windrive, this drive does’nt exist, I have an approx. 8gig hard drive, in properties C drive has 7+gig and E has the rest allocated to it. I have not partioned C drive. Some how windows has allocated this Windrive for some reason, trouble is some programs I want to install, like Mcafee want to install to E drive, and come up with not enough room to install as only around 70mg. and won’nt give meoption to say “C”. Any ideas on how to get rid of this, will not delete.