48. Disable the low disk 
space check 
If you've got a second hard drive that is filling up, or 
a partition that's getting near its space limit, Vista will warn you... And warn 
you... And warn you, with little pop-up notifications appearing in the taskbar 
every little while. This can get annoying fast, especially when you see that the 
system is polling the disks every few minutes to bring you this important 
warning. It's quite easy to disable though, with a quick registry hack doing the 
job. 
One caveat: Having a decent amount of free disk space IS important if the partition in question is your C: 
drive where Windows resides. If you want to disable this warning, pay occasional 
attention to the state of your file space please.
To disable the low disk space 
check/notification:
Open the 'start' menu, type 'regedit' and hit Enter.
Navigate to 
'HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies'
If you have a registry key named 'Explorer' at this 
location, click on it to open it. If not, create one by right clicking on the 
right hand pane and selecting 'new/key.' Call the new key 'Explorer.'
Navigate to Explorer and create a new DWORD value named 
'NoLowDiskSpaceChecks' and give it a value of '1'.
Disk checks will now be disabled.
49. Disable 8.3 name creation 
for files
The 8.3 namespace is a method of naming files used in DOS 
and Windows 3.1 (for example myfile83.exe). This naming standard has not been 
necessary since Windows 95 hit stores some 12 years ago. To maintain some 
illusion of backward compatibility the feature has been kept, and if you do 
happen to use a DOS-based 16-bit application that can only recognize 8.3 
character file names, you will need it. Otherwise, as Microsoft itself says:
"The creation of 8.3 filenames and directories for all 
long filenames and directories on NTFS partitions may decrease directory 
enumeration performance."
...In other words, it's slowing you down.
To disable 8.3 name creation in 
Windows Vista:
Open the 'start' menu, type 'regedit' and hit Enter.
Navigate to 
'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem'
Change the value of the 'NtfsDisable8dot3NameCreation' 
DWORD to '1'.
50. Disable last access file 
update
By default, any Windows installation that is using the 
NTFS file system (that is, almost any installation of Windows 2000 or later) 
updates each file with a date stamp every time it is accessed. If you don't 
think this feature is useful, save yourself some unnecessary disk access by 
disabling it. Note that this is not the same feature as the 'file last modified 
on:' information that appears when you bring up the properties of a file in 
Explorer, so disabling last access update will not disable that information.
To disable last access file 
updating:
Open the 'start' menu, type 'regedit' and hit Enter.
Navigate to 
'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem'
Change the value of the 'NtfsDisableLastAccessUpdate' 
DWORD to '1'.