My Adobe PDF converter won't print through Illustrator

Hi, 🙂

My AI used to print to PDF just fine. Sudddenly, i get a "PPD not specified - Default PPD will be used" error message. When I try to print, it doesn't give me a "Save As" option anymore. I've tried the below options and got nowhere:

• changing the PPD Settings but it won't let me, it sticks to default - changed the defaults too.
• Uninstalling and Reinstalling my AI and the Adobe PDF Converter
• Microsoft Print to PDF but it creates random lines/shapes on the document and artwork. 
• changing the presets
• editing the converter destination

I've asked my colleague to print from their computer but the document wouldn't print. I've tried with previous versions of documents, and still nothing. I have exhausted all options I can think of and in desperate need of help to fix this. 

Please help :(. Thank you 🙂