Powerpoint to pdf on windows with acrobat pro results in low quality

Hi,

I'm having trouble with converting my powerpoint to pdf using acrobat pro. On my windows pc when I export the quality is very low, most images are blurry and the file is very heavy. When I export the same file through a mac the quality is much higher, no blurry images and the file is lighter.

I have tried printing in pdf with all the high quality and press quality settings, I have tried saving as pdf from powerpoint, exporting the pdf from powerpoint and even creating the pdf from acrobat pro. The quality is still terrible.

Please help