I can understand that, but to lose 2/3 of your speed?? Is THAT to be expected?

If you want to use only the Standard Shield at High sensitivity, disable WebShield (your http traffic won't be scanned, although the files saved in the HDD will be caught by the Standard Shield). If you prefer, you can use Standard Shield at Normal sensitivity, disable scanning of open/create/modify files and let WebShield enabled. I'd rather the second option 8)

Do I leave the Email option activated?