To Run Windows In Linux you must have VirtualBox to be installed. This tool is created by Sun Micro systems. By this you can install Linux inside windows or windows inside Linux or mac inside both Linux or windows.

Here we describing how to run Linux in a windows machine

1. Download VirtualBox from here
2. GRAB your favorite Live Linux ISO
3. Install VirtualBox (you may encounter a couple of Windows warnings, click "continue anyway") You may be prompted to reboot. If so reboot your pc.

Setting up VirtualBox:

Start VirtualBox: Start-> Programs-> InnoTek VirtualBox-> VirtualBox

From the VirtualBox control applet, click "New" (then click "Next" in the wizard window that pops up)

Now we need to create a virtual machine: Enter a Name you would like to call this virtual machine and select the operating system type from the OS Type dropdown. (example: Linux 2.6) Then click "Next"

On the next page, move the slider to select how much memory you would like to dedicate to this virtual machine. (example: 512MB) Then click "Next"

We can skip the next page (Virtual Hard Disk) by clicking "Next"

On the Summary page, review your settings and click "Finish"

Now select "Start"from the control applet to start your virtual machine

Once started, you should see a virtual machine window. From the navigation menu, select devices-> Mount CD/DVD ROM-> CD/DVD ROM Image

You should now see a virtual disk manager window. Click "Add" and browse to your Linux ISO (image file) then click "Open" to add the ISO

You should now see your ISO listed. Click "Select" from the bottom of the virtual disk manager

From the virtual machine window navigation menu, select the "Reset" option

Virtual machine will attempt to load the Linux ISO that you have selected and if successful, you should now be looking at your own personal Linux desktop from within Windows.

Use the Cntrl key to switch between Linux and Windows.

You’re sick of typing control alt delete (CTRL+ALT+DEL) every time you need to login to your dev server and you want to change your server’s password policies. It’s dev so you’re comfortable loosening security…

*** DO NOT DO THIS IN A PRODUCTION ENVIRONMENT!!!

To disable CTRL+ALT+DEL

• Open Group Policy Management

Select Local Security Policy – Enable this option to turn off the ctrl-alt-del

To change the password policy

Open Local Security Policy

To change the password policy you will need to login to the domain controller using Group Policy Management from your administrative tools menu

Right mouse key on Default Domain Policy and

The Group Policy Management Editor will appear. In this window you can adjust the security settings for your entire domain.

The same methods we used in Windows XP and Windows Vista can be used to speed up Windows 7 . In Windows 7 there are many unwanted services .Many of these services are not meant for a normal home PC user . You can disable these settings , as per your requirements .

1. Application Experience
2. Computer Browser
3.Error Reporting Service
4. Desktop Window Manager Session Manager
5. Diagnostic Policy Service
6. IP Helper
7. Offline Files
8. Portable Device Enumerator Service
9. Print Spooler
10.Distributed Link Tracking Client
11. Protected Storage
12.Secondary Logon
13. Server (If your computer do not connect with any network)
14. Tablet PC Input Service
15. Themes
16. TCP/IP NetBIOS Helper
17. Windows Media Center Service Launcher
18. Windows Search
19.Remote Registry
20. Windows Time
21. Windows security center
22. Windows updates
23. Windows firewall (Provided you have a security software installed)

To disable these Windows 7 services ,

Goto Control Panel -> Administrative tools -> Services and disable the service that you doesn't want