01-26-2012 01:20 AM
help me : nis to 12 when the computer does not work, it automatically scans your computer slow down, to disable this automatic scan, then how?
01-26-2012 09:15 AM - edited 01-26-2012 09:55 AM
Welcome to the Norton community. Sorry that your post wasn't answered yesterday.
Am I correct in assuming that you have NIS 2012 v. 220.127.116.11? You can find the version number at Support | About. There have been a few recent updates delivered to NIS 2012 via LiveUpdate in the past two days that have created problems for some users (see dsvasan's thread here titled NIS 2012 Quick Scan for one example) so please let us know if your slow scans have just started recently or if this is an older problem.
In the mean time here's some background on NIS scanning.
Norton runs several background tasks that run during idle mode that are listed at Performance | Norton Tasks. All of these tasks can be disabled or re-configured except for Norton Insight (which queries the Symantec servers for updated trust rating for your installed applications) and Idle Quick Scans (which are scheduled to run each time a LiveUpdate downloads an updated set of virus definitions). Most of these background tasks will be temporarily suspended when you bring your system out of idle (i.e., if you move your mouse or start typing on your keyboard) and will re-start the next time your system goes into idle until it runs to completion. Once the task is finished its status in the Norton Tasks window will change from Canceled (i.e., temporarily suspended and waiting for the next system idle) to Complete.
Idle Quick Scans cannot be disabled and they are currently designed to run to completion once they start, so if you find that your computer is responding slowly (i.e. programs open slowly or your mouse doesn't move quickly) then try decreasing the Idle Timeout setting on your Norton tasks window down from 10 minutes to 1 minute. This increases the likelihood that the your Idle Quick Scans will be able to run to completion while your system is still in idle. If you decrease the Automatic Resume Delay and Automatic Tasks Delay settings this should also decrease the amount of time Idle Quick Scans are running outside of idle mode.
The frequency of your Idle Full System Scans can be changed in your settings. I use NIS 2011 and the setting is found at Settings | Computer Settings | Computer Scans | Idle System Scans, but in NIS 2012 I think this setting now called Full System Scans instead of Idle System Scans. The default frequency for Idle Full System Scans in NIS 2012 is monthly, and if you choose to disable your Idle Full System Scans by changing this setting to Never then I would strongly recommend that you run a manual full system scan at least once a month (Scan Now | Full System Scan) or schedule a monthly full system scan to run automatically at a regular time when you know your system will be idle (e.g., the first day of the month at 2:00 AM). See elsewhere's instructions here on how to create a custom schedule for your full system scans.
Note that Idle Quick Scans in NIS 2011 scan fewer files and are not as thorough as Idle Quick Scans in NIS 2012, so Symantec recommends that NIS 2011 users run weekly, rather than monthly, full system scans.
Other tasks like Insight Optimizer (a disk defragmenter) and Norton Community Watch could also be contributing to the problem, so please see my instructions here in Jerry20's thread Disabling All Idletime Activity to determine which specific Norton Tasks are running during a system idle.