Q1) I enabled the "Active scanning". Will all PCs (include active, inactive and new PCs) be full scan again regular?
Active scanning queries the domaincontrollers for new found logons and add the new computers to the scanning queue.
A computer will only be scanned maximum once every 8 hours.
When the scan is done the normal waittimes apply.
Q2) If I enable the "Scheduled scanning", will all PCs (include active, inactive and new PCs) be full scan again? or it just scan the inactive ("Not scaned") and new PCs?
All computers in the ou will be tried to scan, even the ones that are offline.
When the scan is done the normal waittimes apply.
Q3) If I enable the "IP Range scaning", will all PCs (include active and "inactive and new PCs) be full scan again? or it just scan the inactive ("Not scaned") and new PCs?
All devices in the range will be tried to scan.
When the scan is done the normal waittimes apply.
Make sure you disable "ignore windows" when you want to scan computers.
Q4) In the "Scanning setup - Item wait time", it will only rescan the active PC? right?
Could you please rephrase the question.
Q5) In the individual PC, I found that the scan times of "Autorun" is around 600 seconds, which is quite long. Is it normal?
no, see this link:http://www.lansweeper.com/forum/yaf_postst3321_Autorun-Misconfigured-report.aspx