Can’t cd to my c drive

Hi, I’m having an issue in Dos all of a sudden where I can’t cd to my c drive.

We are on a Samba domain and I am using XP SP2

This was never a problem until recently.

When I open cmd I am taken to our H: drive which is used for our Linux Profiles.

At the H:\ I type cd c: as always, I have done it a million times. Today however when I do it get the following.

H:\cd c:
c:\

H:\

It takes me right back to my H:\ prompt?

I tried creating a new folder on cd and doing the following with the same result

H:\cd c:\uploads
c:\

H:\

I’m baffled by this change and need to cd to my c drive..

Any idea would be most appreciated.

Thanks