Registry Editor Keys

XP Classic Start Menu

Through this registry changes you can choose classic XP start menu and disable the option to set it to Window XP version
Go to Start and Run then type Regedit
Go to the following registry key
Hkey_Current_User \ Software \ Microsoft \ Windows \ Curre Ntversion \ Policies \ Explorer
Then go to
Modify / Create The Dword Value Of Data Type Reg_Dword Name (NoSimpleStartMenu) 0 value is use for default XP menu and 1 is use to set it to XP classic Menu, remember that no one will change it through regular method, but it will restrict all other methods to change it.
Exit from registry and restart your computer

Disk Operating System

This operating system was the first, that was installed on personal computers widely, Bill Gates (Microsoft Corporation) firstly developed PC-Dos for IMB, then he got its rights for its new version MS-Dos. DOS was a non-graphical interface not friendly like Windows operating systems, and basically work on commands, now a days Windows operating system still support DOS interface for special tasks, and it provide the DOS non-graphical interface.

Find MAC address of LAN computer

Get MAC Addres of a compute on LAN
Goto start and Run
type Cmd
and at Dos prompt type
Ping xxx.xxx.xxx.xxx (Ip address of the computer you want to get its MAC address)
when you get the reply
type arp -a
It will show you MAC address under the physical address

Delete Temporary Files

Goto Run
Type  %temp%
Press Ctrl + A (To select all files)
then press delete or
Hold down the Shift key + Del to delete all files directly without send them to recycle bin