1.Click Start, and enter into Control Panel.
2.Then choose Programs and Features.
3.After you enter in, you can see all your programs listed, right click the software you don't want.For example.I don't like 7-Zip 16.02(x64).I right click it and click Uninstall and a small window open, choose Uninstall again.
We all know how to delete files or move the file to recycle bin, but the files are not deleted thoroughly, if you want to delete those files permanently, follow below steps.
1.Open the folder and locate the file you want to delete permanently.
2.Press Shift + Delete key at the same time, a window will pop up, asking you "Are you sure you want to permanently delete this file? ", the file name and created date information will be listed below. Click Yes to complete the deleting process, if you don't want to do so, Click No.