I have a dedicated laptop for my Taz 6. It is a Core 2 Duo at 2GHz running Windows 7. It is a pretty old laptop, but it has never run a program excessively slowly before.
I just downloaded the new Cura 2 version and it seems pretty nice except for two things. It takes forever to load, and it runs VERY slowly. That is almost tolerable except for the fact that printing via USB is un-usably slow. When printing from USB, the print head stops and starts, evidently waiting for a new instruction to arrive from the computer. If I save that G-Code to the SD card, then it prints from the car just fine.
The old Cura version works briskly on the same setup. Printing via USB is no problem at all.
One other thing that I do not like is that there is no screen (that I can find) that shows the results of the self-leveling procedure. Occasionally I get very odd values which indicate a failure of the leveling procedure. This is rare, but it tells me that I need to abort and try again. Without that readout, then the print could proceed and give poor results after wasting filament.
Any suggestions for these issues?