Cursor frozen and cannot cut the computer off or move the cursor

If your Lenovo is running Windows, you use your keyboard to shut it down. One way is to press ctrl + alt + delete; this will open the task manager. Use the keyboard to select your options or to shut it down from here.
Another way is by pressing alt + f4, but you must be in your desktop (main display). Also use the keyboard to select your options.

(1) You can try ctrl-alt-del buttons on keyboard press all @ same time select (use arrow keys) to move to restart press enter on keyboard or (2) hold power button for 6 seconds it will shut down then wait 3 seconds push start button as normal should re-boot
Hope this helps

(1) You can try ctrl-alt-del buttons on keyboard press all @ same time select (use arrow keys) to move to restart press enter on keyboard or (2) hold power button for 6 seconds it will shut down then wait 3 seconds push start button as normal should re-boot
Hope this helps

You can use this
Ctrl + A Select all contents of the page. Ctrl + B Bold highlighted selection. Ctrl + C Copy selected text. Ctrl + E Aligns the line or selected text to the center of the screen. Ctrl + F Open find box. Ctrl + I Italic highlighted selection. Ctrl + J Aligns the selected text or line to justify the screen. Ctrl + K Insert link. Ctrl + L Aligns the line or selected text to the left of the screen.
Ctrl + M Indent the paragraph. Ctrl + P Open the print window. Ctrl + R Aligns the line or selected text to the right of the screen. Ctrl + T Create a hanging indent. Ctrl + U Underline highlighted selection. Ctrl + V Paste. Ctrl + X Cut selected text. Ctrl + Y Redo the last action performed. Ctrl + Z Undo last action. Ctrl + Shift + F Change the font. Ctrl + Shift + > Increase selected font +1pts up to 12pt and then increases font +2pts. Ctrl + ] Increase selected font +1pts. Ctrl + Shift + < Decrease selected font -1pts if 12pt or lower, if above 12 decreases font by +2pt. Ctrl + [ Decrease selected font -1pts. Ctrl + Shift + * View or hide non printing characters. Ctrl + Moves one word to the left. Ctrl + Moves one word to the right. Ctrl + Moves to the beginning of the line or paragraph. Ctrl + Moves to the end of the paragraph. Ctrl + Del Deletes word to right of cursor. Ctrl + Backspace Deletes word to left of cursor. Ctrl + End Moves the cursor to the end of the document. Ctrl + Home Moves the cursor to the beginning of the document. Ctrl + Spacebar Reset highlighted text to the default font. Ctrl + 1 Single-space lines. Ctrl + 2 Double-space lines. Ctrl + 5 1.5-line spacing. Ctrl + Alt + 1 Changes text to heading 1. Ctrl + Alt + 2 Changes text to heading 2. Ctrl + Alt + 3 Changes text to heading 3. Ctrl + F1 Open the Task Pane. F1 Open Help. Alt + Ctrl + F2 Open new document. Ctrl + F2 Display the print preview. Shift + F3 Change the text in Microsoft Word from upper to lower case or a capital letter at the beginning of every word. Shift + Insert Paste. F4 Repeat the last action performed (Word 2000+) F5 Open the find, replace, and go to window in Microsoft Word. Ctrl + Shift + F6 Opens to another open Microsoft Word document. F7 Spell and grammar check selected text and/or document. Shift + F7 Runs a Thesaurus check on the word highlighted. F12 Save as. Shift + F12 Save. Ctrl + Shift + F12 Prints the document. Alt + Shift + D Insert the current date. Alt + Shift + T Insert the current time.

screen is black and says a disk read error occurred press ctrl+alt+Del to restart

According to the manual
Using Emergency Shutdown Procedures
If the notebook does not respond to the Windows shutdown
procedure (Start > Turn Off Computer > Turn Off), try the
following emergency shutdown procedures in the sequence
provided:
■ If the notebook is running Windows XP Professional: Press
ctrl+alt+delete. Select the Shut Down button, then select Shut
down from the drop down list.
■ Press and hold down the power button for at least 4 seconds.
■ Unplug the notebook from external power and remove the battery pack.