How to convert dynamic disk back to basic disk

Recently I installed windows 7 on my laptop. While installing I came to know that I can't make more than 4 disk partitions. After successful installation, I decided to shrink one of the highest space drive. Windows said I needed to convert the drives to dynamic for this purpose. I did that. Later that day I wanted to repartition my drives and install windows 8.1, windows restricted me to do so because the drives were dynamic. So after hours of struggle I was able to convert them back to basic and I think this information might me helpful for someone someday, hence posting it here:

1. Boot your system with windows installation dvd in it.
2. Click Repair your system.
3. Open command prompt.
4. Type diskpart
5. Type list disk
6. Type select disk 0
7. Type clean

Repeat steps 6 and 7 for all the disks which you have. That's all! Your factory fresh system is in your hands :)