"Brian V" wrote in message
...
Inside my computer tower is one hard-drive. But I have two in my computer.
It
is like the drive is seperated into a C: and D: drive. Why is this? Can I
rejoin them? If they were split, does it take away from the amount of
space
there is there (say it's 400gB would this situation make it 350Gb one has
access to. The other 50Gb being a buffer of some kind?)?

Your hard disk has been partioned. That is it has been formatted into two
parts which are seen as separate drives. It is possible to re-format into
one partition. Either copy off ALL your data and reformat and re-install
Windows and all your software - you would, then have to reconfigure your
software. It is also possible to re-partition using software like Partition
Magic which claims to re-partition without the need to reformat - but I
can't comment on its success..

Overall the best advice is to do nothing - unless it is actually causing a
problem!

Regards.

Bill Ridgeway