[Tex/LaTex] I can’t write on file ‘Filename.pdf’

Im new to latex and sometimes I get this error message:

line 5: ! I can't write on file 'MasterThesis.pdf'. Please type another file name for output! Emergency stop.<to be reaad again>... ...\end{document}
Line 1: !==> Fatal error occured, no output PDF file produced!

Today when I got this message nothing seems to work to fix it. I have tried the following:

Installed a new editor which gives the same error (TeStudio and TexMaker)
Deleted all files except the tex file
Close all programs and processes in task manager that seems to be PDF-related
Restart the editor (TexMaker)
Reboot the computer
I got several GB left on the disk drive
Searched through the internet to find a solution
Rename the tex file to only letters (no spaces, dots, symbols, etc)
Change the name of the folder that contains the file

Last thing I did was to remove everything in the tex file (with backup of course) except for the following:

\documentclass[12pt, a4paper]{article}

\begin{document}
    Hello
\end{document}

But I still get the same error.

If I create a new empty file it manage to compile. Then I paste my work into it and the error occures. So I press ctrl+z a couple of times to undo until I reach the document that works but then the error is still there
Im using Windows 8 and TexMaker.

Im working on my master thesis and it's very frustrating when I can't continue my work. Could someone please help me with this?

Best Answer