How to use mouse pointer when mouse fails to work.
Step 1: Press “left ctrl + left shift + number lock” at a
time.
Step 2: A wizard opens and asks you whether to activate the
mouse keys or not, click yes for that.
Keys used
1: move left side down
2. move down.
3. move rightside down
4. move left side.
6. move right side.
7. move left side up.
8. move up.
9. move right side up.
5. right click.
+. Double click.
0. click and hold.