The cursor in 7.5 is fine

It is recommended that Hyperthreading be deactivated.
See the KB Article https://www.steinberg.net/nc/en/support/knowledgebase_new/show_details/kb_show/optimizing-windows-for-daws.html?tx_p77sbknowledgebase_pi1[o_system]=2&tx_p77sbknowledgebase_pi1[productfamily]=2&tx_p77sbknowledgebase_pi1[product]=337
You edited your post which initially asked if this was a windows setting. I assumed you were unfamiliar with BIOS settings.