Problem whit hard disk

["Volontè Alessio" <alex@enet.it>]

I have an IBM Think Pad 750C whit 486 dx/2 66Mhz processor, 12 Mb of Ram
memory,
327 Mb on Hard Disk and Windows 95.

The problem is: when I turned off the computer on Hard Disk there were 15Mb
of free space, but when I turned on the system, on hard disk there were
only 2 Mb of free space.
And, whitout execute any program or register nothing, free space changes
continuously form 5 Mb to 190 Kb.
I try to cancel 7 Mb from hard disk, but the space is return again to 3 Mb,
and it change continuosly again.

Any body can help me ?

Please, send me the answer by E-mail, at Alex@enet.it

Thankyou.