Quartus very slow since migrating to Windows 10

To optimize the analysis and synthesis time, you could go to Tools> Advisors> Compilation Time Advisors. Go to 'Reduce Analysis & Synthesis' to follow the recommendations stated for time reduction. You can refer to the document below (Reducing compilation time) for more details. https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/qts/qts_qii52022.pdf