After formatting all history is gone.
But we won''t help you circumventing such trial restrictions by cheating by reinstalling an OS. If you used it for 7 days on your old OS, and want to keep using it, you need to pay for the license.
That's why I'm locking this thread.
Sorry, I accidentally deleted your post. This is a repost.
"i am using a software for trail version of 7 days, after that if i install it says license is invalid. So i formatted my complete hard drive and installed os windows 8.1. Later i installed software again, actually i need to get a trail version of 7 days, but it is saying that license is invalid.
I want to know weather after even formatting is some registry files are not cleared..??
please help me out to use that software"