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.
When your computer runs slower and slower or programs/browsers take longer time to reply, it is time to clean your computer now, a basic method to clean computer is disk cleanup, steps below will tell you how to clean and speed up your pc.
1.Click Start button on the left bottom of taskbar, type clean in the search box.
2.Click on Disk Cleanup, a new window appear, C disk was selected by default, click OK.
3.Disk Cleanup window shows up, system will self-scan, after the scan process, a new window will appear.
4.There will be a files list, temporary files and other files are listed and checked, un-check options you want to delete. Click OK to clean and a confirm window will pop up, clicking Delete Files to complete the clean process.