I want to conduct online Tuition. How to do this?

Just visit and log in with the following website. I'm using this. It's too good. I recommend this for housewives to start online tuition classes, to spend their time usefully.

www.wiziq.com

You can join as a Teacher or Student. The services are free with some limited option. 

How to check the DND status of my mobile number?

Click this link below to reach a weblink given by TRAI

1. http://nccptrai.gov.in/nccpregistry/search.misc
2. Type your mobile number
3. Click Search.

That's it.

How to unblock Telemarketing calls?

Mmmmm... very strange question...

1. Dial/Call 1909 and follow the instructions from your mobile.
   You can also dial from your landline.
   OR
2. SMS to 1909 with keywords 'STOP DND' for de-registration

How to block Telemarketing calls?

Very simple!

1. Dial 1909 and follow the instructions from your mobile.
   You can also dial from your landline.
   OR
2. SMS to 1909 with the words 'START DND' and follow the instructions to register.

How to see the formula of a cell in my spreadsheet?

There are two ways to display the formula than the results.
Point to the cell. Then . . .



1. Press Ctrl and ~ (Ctrl-Tilde)

OR

2. Tools | Options | View tab | Window Options section, check Formulas

Suggest me a free software to clean the registry of my PC.

Here is my top 5 Free Registry Cleaners.

1. CCleaner
2. JetClean
3. Wise Registry Cleaner
4. Registry Repair
5. Easy Cleaner