I have a Kingston pendrive that i have formatted 20 times.
Whenever I try to make a bootable USB for installing Linux, I am not able to boot from it. I tried the same thing with another pendrive and it works fine.
Any ideas what the problem is?
Your USB drive has partition tables, and one of them is hidden from you which includes the USB software from the Manufacturer. The part of the drive that you have formatted over 20 times is the one that is not able to be booted from by the computer.
If you are using Linux, you can use gparted to completely delete all partitions and format the USB disk as a whole.
If you are using Windows this can be done under Disk Management by also deleting all the partitions and formatting the drive as a whole.
Please list your OS so we can be of further assistance.
For Windows use the following steps to format the entire drive.
After doing that, you should have a completely unallocated drive.
I had the same problem with a Kingston Data Traveler stick (U3 version). Those U3 USB sticks are not simple USB sticks. They have their own partition table where they also include their own software.I tried a million times not just to format, but to re-partition the whole thing in order to install linux with no success at all. Other sticks without those features worked fine.
Just grab a plain usb stick without the U3 features and hope you will have more luck ;-)