Hi Abhijit,
1. Your English translator is crap.
2. I think you are saying that the system has a single 80g drive and you want to run a vmware on it?
If so then you will indeed find space an issue because vmware and windows both see that drive as being full for making their page files and windows will (by default) block vmware from sharing that space.
Possible solutions are in order;
a. Install a new hdd and put vmware (and its temp page files) on that one.
b. Partition the drive you have into 3 smaller ones… a 3g drive to hold windows page files, a 40 g system drive and the rest to hold vmare.
Option b will give you (just) enough space to squeeze them both onto your 80g but it will be tight.