You want to use the pictures from your powerpoint presentation slide. A simple cut/copy and paste won't do.
- Open your powerpoint presentation.
- Go to File menu> Save As> Other Formats.
- In the next opened dialog box set save as type to "Web Page".
Go to location where you just saved it. There are two things, a web page and a folder. Open folder and here you go. But remember there will be two photos of same type one is in original quality check by opening it.