MICROSOFT WINDOWS SHORTCUT KEYS

Shortcut Keys                              Description

1. Alt +Tab               -        Switch Between open application   

1. Alt +Shift +Tab       -      switch backwards between open applications.
2. Alt +double-click    -      display the properties of the object you double click on. 
3. Ctrl + Tab               -      switches between program groups or document windows in application                               that       support this feature                   
4. Ctrl +Shift +Tab     -       Same as above but backwards
5. Alt +Print screen      -     Create a screen shot only for the program you are currently in.
6. Ctrl +Alt +Del          -     Reboot the computer and/or bring up the windows task manager.
7. Ctrl +Esc               -       bring up the Windows start menu. In windows 3.x this would bring up the task manager.
8. Alt +Esc              -         switch between open application on task bar.
9. F1                        -        activates help for current open application
10. F2                         -       Renames selected icon
11. F3                          -      starts find from desktop.
12. F4                           -     opens the drive selection when browsing
13. F5                            -    Refresh contents
14. F10                         -     activates menu bar.
15. Shift + F10               -    Simulates right-click on selected item.
16. F4                             -   select a different location to browse in the windows explorer toolbar
17. Alt +f4                       -  closes current program
18. Ctrl +F4                  -     Closes window in program.
19. F6                             -   move cursor to different window explorer pane
20. Ctrl + space bar          - Drops down the window control menu.
21. Ctrl +(the '+' key on the keypad) - automatically adjust the widths of all the columns in windows explorer
22. Alt +Enter               -     opens properties window of selected icon or program
23. Shift + Del              -    delete program/ files without throwing them into the recycle bin.
24. Holding Shift          -     boot safe mode or by pass system files as the computer is booting
25. Holding Shift            -   when putting in an audio Cd, will prevent Cd Player from playing.
26. Enter                       -    activates the highlighted program.
27. Alt + down arrow     -  display all available option on drop down menu.
28. *(on the keypad)        - expands all folders on the currently selected folder or drive in windows explorer.
29. +(on the keypad)         - expands only the currently selected folder in windows explorer.
30. -(on the keypad)           -  collapses the currently selected folder in windows explorer.

Cached Pages

Sometimes your company , colleges or government firewall may have blocked access to particular webpages, but you still be able to access it by viewing a cached copy of it on a search engine!
                       All you have to do is:
Step1-Start your browser and connect to any popular search engine of your choice .I am going to use Google  for this example.
Step 2-Search for blocked webpage that you wish to access.(In this case I am going to search for the keywords 'why this kolaveri di wikipedia'.
Within the search result that get displayed, look for the relevant blocked page that u wish to access and click on the CACHED link below it or next to it to access its cached copy. On Google ,in case you do not see the cached link below the search results, then u need to move your mouse over the instant preview
button next to search result and the on the right hand side preview space, the CACHED link will appear .
The best part about the technique is that network will think that u r simply accessing Google(which may not be blocked), but in reality u r using the search engine to access blocked content. As simple as that!
When u clicked on cached link of a search result, then within a few seconds, Google will open the most recent cached copy of that page and display it for u. Irrespective of whether that page may be currently down or may have been blocked by your network, u r still able to see it.
It is also possible to directly view a cached copy of a particular webpages or URL by using simple search operators on Google.For example, on Google if u were to search for cache:www.timesofindia.com,it will automatically display the most recent cached copy of Times Of India home page.

Note-When u r viewing a cached page, typically google will mention at the top the date n time from which the cached copy  is being displayed.This may vary from webpages to webpages.
It is possible for a web developer to specify that google should not Cached its webpage and in such a case the cached link or the cache operator  may not work or may just display the most current version of the page