First, right click on Holdem Manager and get into the advanced and click on < run as administrator>. Do that for Holdem Manager.exe and HMimport.exe.
Run Holdem Manager and get it importing, doesn't have to be importing purchased hands, just click on < Start Auto Import >.
Then right click the taskbar and click on Start Task Manager, go into < processes > find holdem manager programs. Both import and HoldemManager.exe should be there.
Right click on each one and set affinity so that it is using all the cores of your processor. Also set priority to < high >. Click apply and ok and shut down Holdem Manager. Then it would be a good idea to reboot.
After doing the above there was a very visible difference in the speed of importing purchased hands and also the HUD worked much faster playing ring games. The priority on mine was set to normal and going to high really perked it up.
Even with the priority set to high I was able to run Holdem Manger, Full Tilt, Holdem Indicator, and Outlook with no problem. But it sure seemed to make Holdem's HUD perk up and while I was importing purchased hands it went much faster.