Finding out the reason of a Windows crash
If you would like to know the reason why there was a sudden crash of Windows, change the DWORD-value ShutdownReasonUI temporarily to 1 in the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\ Microsoft\Windows\CurrentVersion\Reliability
After a reboot you will find the reason why your Windows shuts down suddenly in the log files (Control Panel, Administrative Tools, Logfiles). If you are finished analyzing, change the value ShutdownReasonUI back to 0.
Windows search optimization
Within Windows XP you are able to search your computer for files (Start, Search), but takes some clicking to get what you want! To optimize the search function, you have to make some registry changes. To make changes, navigate to the following key:
HKEY_CURRENT_USER\Software\ Microsoft\Windows\CurrentVersion\Explorer
where you will find some important DWORD-values. Change these values to optimize your Windows search:
SearchSystemDirs=1
SearchHidden=1
IncludeSubFolders=1
CaseSensitive=0
SearchSlowFiles=1
Finding out the reason of a Windows crash
If you would like to know the reason why there was a sudden crash of Windows, change the DWORD-value ShutdownReasonUI temporarily to 1 in the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\ Microsoft\Windows\CurrentVersion\Reliability
After a reboot you will find the reason why your Windows shuts down suddenly in the log files (Control Panel, Administrative Tools, Logfiles). If you are finished analyzing, change the value ShutdownReasonUI back to 0.
A faster NTFS file system
You probably use the NTFS file system (see the properties of your C: partition). You can improve performance by making some changes in the following registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Filesystem
Change the following registry values, as you wish:
DisableNTFSLastAccessUpdate=dword:00000001 (last file access is no longer registered).
NtfsDisable8dot3NameCreation=dword:00000001 (no more double filenames: long names and the old 8.3 variant (the 8.3 file notation is used for the older Windows versions).
NtfsMftZoneReservation=dword:00000002 (if there are many files on a partition, the master file table (MFT) can get fragmented, with this tweak there will be no more fragmenting of the file master file table (default value = 1, range 1-4).
Source:Various