Change the size of your Desktop Icons in window 7:-

Keep your mouse over it. Hold CTRL. Scroll your mouse wheel until they are the desired size.

to make the quick launch tool bar in windows 7 like xp:-

Right-click the taskbar, choose Toolbars > New Toolbar, type "%UserProfile%\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch" (less the quotes) into the Folder box and click Select Folder. Next right-click the taskbar, clear 'Lock the taskbar', and you should see the Quick Launch toolbar, most likely to the right. Right-click its divider, clear Show Text and Show Title to minimize the space it takes up. Complete the job by right-clicking the bar and selecting View > Small Icons for the true classic look.

steps to hide your shut down button:

You can hide the Shutdown button from the Start menu using registry editor and also restrict access to shutdown, if a user clicks on Ctrl+Alt+Del. 
Follow the given steps to hide system shutdown button from start menu:

1. To use this feature, you will need to be logged into your computer with
administrative rights.
2. Click Start button and type regedit in Run option then press Enter for next.
3.Here locate the location to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion \Policies\Explorer
4. Here in right side panel, right click to create a new DWORD value with name NoClose.
5. Now assign number 1 to its value data box.
6. Now close the registry editor and restart your computer after any changes to go into effect.
7. But next time, if you want to unhide the shutdown button then simply change the value data box to 0 or delete this DWORD item.

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Find files by date modified in Windows.............

1. Open the Windows File Explorer
2. In the search box, in the top right corner of the window type datemodified:
3. After datemodified: has been typed the "Select a date or date range" window will appear, select the date or date range for when you believe the file was last modified.
4. Depending on the dates this search may take a few seconds to a minute to complete.

Access Windows Desktop icons without minimizing anything

1. Right-click on the Windows Taskbar.
Click Properties.
2. In the Taskbar and Start menu Properties Window, as shown below, click the Toolbars tab.
3. In the Toolbars tab check the Desktop checkbox and click Apply.
4. Once the above steps have been completed you should have a Desktop option by the Windows Notification area of your Taskbar...........

Windows 7 has changed Control Panel a little

Windows 7 has changed Control Panel a little, but it's still too difficult to locate all the applets and options that you might need. God Mode, however, while not being particularly godlike, does offer an easier way to access everything you could want from a single folder.

To try this out, create a new folder and rename it to:

everything.{ED7BA470-8E54-465E-825C-99712043E01C} .....