ive stupidly click on hash check before downloading..it takes AGES…
so could anyone tell me how to take automatic hash checks off? 
hash check before downloading will only be done if the files you’re downloading already exist, either complete or partially complete. Without the hashcheck, there is no way for bitcomet to know what parts of the download already exist.
If you want to speed up the hash check, change your option “bittorren.hash_check_low_priority” value to “false” in advanced options. This will allocate more system resources to doing hash checks. However this will have adverse effects of using more system resources.