Microsoft PowerPoint Errors

Hey there.
I am currently in the middle of an important research paper due in 4 days!
For some reason my computer acts up only when I have something critical to do..

While using Microsoft Powerpoint, it randomly freezes up and says Microsoft powerpoint has stopped working collecting error etc...
But that not the main issue;
The trouble is upon saving, I get this message: Powerpoint was unable to open or save this document. Please ensure you have access privileges to read or write the document and that it is not encrypted.



Also ........is read only. Do you want to save changes to a different file name?

Please help! It was doing fine so far until this error messages started appeari

Where did you Load this PowerPoint? - Read-only Access occurs when Opening a Document that is on a Network or is not Orginally Edited by the Reader

You will need to Save as... to be able to have write Permissions



As for the Crashing...

Could you please give us some details from your Computer

Use Speccy if you do not know

See Speccy - System Information - Free Download For More Information

Many Thanks,
Josh