On Screen Keyboard [OSK]

Type OSK in Run and then hit ENTER.

Hide/Unhide Drives Using Command Prompt

HIDE:
1. Open CMD.
2. type “DISKPART” without quotes and then hit enter.
3. Now,type “LIST VOLUME” without quotes and then hit enter.
4. Now,type “SELECT VOLUME VOLUME_NO.” without quotes and
then hit enter.
Eg. Select volume 5
5. Now,type “REMOVE LETTER ALPHABET_LETTER” without quotes
and then hit enter.
Eg. Remove letter e
Congrets……..

UNHIDE:
1. Open CMD.
2. type “DISKPART” without quotes and then hit enter.
3. Now,type “LIST VOLUME” without quotes and then hit enter.
4. Now,type “SELECT VOLUME VOLUME_NO.” without quotes and
then hit enter.
Eg. Select volume 5
5. Now,type “ASSIGN LETTER ALPHABET_LETTER” without quotes
and then hit enter.
Eg. assign letter e
Congrets……

SYSKEY Password Protection

1. Open CMD.
2. Type “syskey” without quotes.
3. A small window will open.
4. Click on “Update”.
5. A dialog box will open.
6. Click on “password startup”.
7. Choose any password. 
8. Confirm Password.
9.OK.

NOTE: Its tough to break but not impossible.

Remove Shortcut Virus From Your Pendrive

1. Type CMD in Run.

2. Type the following command in CMD.

attrib -h -r -s /s /d g:\*.*

Note : Where 'g' is your pendrive letter, you need to replace 'g' with your drive letter.