Here the all Computer Keyboard Shortcuts:
A. Basic Shortcuts
1. Alt + F {File menu options in current program}
2. Alt + E {Edit options in current program}
3. F1 {Universal help for all programs}
4. Ctrl + A {Select all text}
5. Ctrl + X {Cut selected item}
6. Shift + Del {Cut selected item}
7. Ctrl + C {Copy selected item}
8. Ctrl + Insert {Copy selected item}
9. Ctrl + V {Paste}
10. Shift + Insert {Paste}
11. Home {Go to beginning of current line}
12. Ctrl + Home {Go to beginning of document}
13. End {Go to end of current line}
14. Ctrl + End {Go to end of document}
15. Shift + Home {Highlight/Select from current position to beginning of line}
16. Shift + End {Highlight/Select from current position to end of line}
B. Microsoft® Windows® Shortcuts
17. Alt + Tab {Switch between open applications}
18. Alt + Shift + Tab {Switch backwards between open applications}
19. Print Screen {Create screen shot for desktop screen}
20. Alt + Print Screen {Create screen shot for current program}
21. Ctrl + Alt + Del {Reboot/Windows® task manager}
22. Ctrl + Esc {Bring up start menu}
23. Alt + Esc {Switch between applications on taskbar}
24. F2 {Rename selected icon}
25. F3 {Start find from desktop}
26. F4 {Open the drive selection when browsing}
27. F5 {Refresh contents}
28. Alt + F4 {Close current open program}
30. Ctrl + F4 {Close window in program}
31. Alt + Enter {Open properties window of selected icon or program}
32. Shift + F10 {Simulate right-click on selected item}
33. Shift + Del {Delete programs/files permanently}
34. Holding Shift during Boot up {Boot safe mode or bypass system files}
35. Holding Shift during Boot up when putting in an audio CD {Will prevent CD player from playing}
C. Winkey Shortcuts
36. Winkey + D {Bring desktop to the top of other windows}
37. Winkey + M {Minimize all windows}
38. Winkey + SHIFT + M {Undo the minimize done by Winkey + M and Winkey + D}
39. Winkey + E {Open Microsoft Explorer/Computer}
40. Winkey + Tab {Cycle through open programs on taskbar}
41. Winkey + F {Display the Windows® Search/Find feature}
42. Winkey + F1 {Display the Microsoft® Windows® help}
43. Winkey + R {Open the run window}
44. Winkey + Pause Break {Open the system properties window}
45. Winkey + U {Open utility manager}
46. Winkey + L {Lock the computer -Windows XP® & later}
D. Microsoft Office Word Shortcuts
47. Ctrl + A {Select all contents of the page}
48. Ctrl + B {Bold highlighted selection}
49. Ctrl + C {Copy selected text}
50 Ctrl + X {Cut selected text}
51. Ctrl + N {Open new/blank document}
52. Ctrl + O {Open options}
53. Ctrl + P {Open the print window}
54. Ctrl + F {Open find box}
55. Ctrl + I {Italicize highlighted selection}
56. Ctrl + K {Insert link}
57. Ctrl + U {Underline highlighted selection}
58. Ctrl + V {Paste}
59. Ctrl + Y {Redo the last action performed}
60. Ctrl + Z {Undo last action}
61. Ctrl + G {Find and replace options}
62. Ctrl + H {Find and replace options}
63. Ctrl + J {Justify paragraph alignment}
64. Ctrl + L {Align selected text or line to the left}
65. Ctrl + Q {Align selected paragraph to the left}
66. Ctrl + E {Align selected text or line to the center}
67. Ctrl + R {Align selected text or line to the right}
68. Ctrl + M {Indent the paragraph}
69. Ctrl + T {Hanging indent}
70. Ctrl + D {Font options}
71. Ctrl + Shift + F {Change the font}
72. Ctrl + Shift + > {Increase selected font +1}
73. Ctrl + ] {Increase selected font +1}
74. Ctrl + Shift + < {Decrease selected font -1}
75. Ctrl + [ {Decrease selected font -1}
76. Ctrl + Shift + * {View or hide non printing characters}
77. Ctrl + f {Move one word to the left}
78. Ctrl + g {Move one word to the right}
79. Ctrl + h {Move to beginning of the line or paragraph}
80. Ctrl + i {Move to the end of the paragraph}
81. Ctrl + Del {Delete word to right of cursor}
82. Ctrl + Backspace {Delete word to left of cursor}
83. Ctrl + End {Move cursor to end of document}
84. Ctrl + Home {Move cursor to beginning of document}
85. Ctrl + Space {Reset highlighted text to default font}
86. Ctrl + 1 {Single-space lines}
87. Ctrl + 2 {Double-space lines}
88. Ctrl + 5 {1.5-line spacing}
89. Ctrl + Alt + 1 {Change text to heading 1}
90. Ctrl + Alt + 2 {Change text to heading 2}
91. Ctrl + Alt + 3 {Change text to heading 3}
92. F1 {Open help}
93. Shift + F3 {Change case of selected text}
94. Shift + Insert {Paste}
95. F4 {Repeat last action performed (Word 2000+)}
96. F7 {Spell check selected text and/or document}
97. Shift + F7 {Activate the thesaurus}
98. F12 {Save as}
99. Ctrl + S {Save}
100. Shift + F12 {Save}
101. Alt + Shift + D {Insert the current date}
102. Alt + Shift + T {Insert the current time}
103. Ctrl + W {Close document}
E. Microsoft Office Excel Shortcuts
104 F2 {Edit the selected cell}
105. F5 {Go to a specific cell}
106. F7 {Spell check selected text and/or document}
107. F11 {Create chart}
108. Ctrl + Shift + ; {Enter the current time}
109. Ctrl + ; {Enter the current date}
110. Alt + Shift + F1 {Insert new worksheet}
111. Shift + F3 {Open the Excel® formula window}
112. Shift + F5 {Bring up search box}
113. Ctrl + A {Select all contents of worksheet}
114. Ctrl + B {Bold highlighted selection}
115. Ctrl + I {Italicize highlighted selection}
116. Ctrl + C {Copy selected text}
117. Ctrl + V {Paste}
118. Ctrl + D {Fill}
119. Ctrl + K {Insert link}
120. Ctrl + F {Open find and replace options}
121. Ctrl + G {Open go-to options}
122. Ctrl + H {Open find and replace options}
123. Ctrl + U {Underline highlighted selection}
124. Ctrl + Y {Underline selected text}
125. Ctrl + 5 {Strikethrough highlighted selection}
126. Ctrl + O {Open options}
127. Ctrl + N {Open new document}
128. Ctrl + P {Open print dialog box}
129. Ctrl + S {Save}
130. Ctrl + Z {Undo last action}
131. Ctrl + F9 {Minimize current window}
132. Ctrl + F10 {Maximize currently selected window}
133. Ctrl + F6 {Switch between open workbooks/windows}
134. Ctrl + Page up & Page Down {Move between Excel® worksheets in the same document}
135. Ctrl + Tab {Move between two or more open Excel® files}
136. Alt + = {Create formula to sum all of above cells}
137. Ctrl + ‘ {Insert value of above cell into current cell}
138. Ctrl + Shift + ! {Format number in comma format}
139. Ctrl + Shift + $ {Format number in currency format}
140. Ctrl + Shift + # {Format number in date format}
141. Ctrl + Shift + % {Format number in percentage format}
142. Ctrl + Shift + ^ {Format number in scientific format}
143. Ctrl + Shift + @ {Format number in time format}
144. Ctrl + g {Move to next section of text}
145. Ctrl + Space {Select entire column}
146. Shift + Space {Select entire row}
147. Ctrl + W {Close document}