Its indeed annoying to see the low Hard disk space popping up every now and then; especially when you have already decided to buy a new hard disk...

This can be achieved by two registry key manipulations...

(a) The first one :HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer

In here create a DWORD and name it as "NoLowDiskSpaceChecks" (without quotes) and give it a value 1

(b) The second one : HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

Again create a DWORD and name it as "NoLowDiskSpaceChecks" (without quotes) and give it a value 1

Enjoy till you buy a new Hard disk....