hi im trying to find out y when i ran avast it said unable 2 scan c on all scnanned directories, i cannot access my windows firerwall and scanning for virus is last thing to try. ran boot scan week ago np help??
What reason was given for not being able to scan, password protected, etc. what ?
Many programs (usually security based ones) password protect their files for legitimate reasons such as AdAware and Spybot Search & Destroy, there are others (and avast doesn’t know the password or have any way of using it even if it did know it).
When you run scans with the above programs and you delete harmful entries that they detect, a copy is kept (in quarantine/restore/backup) in case you need to reverse what you did. These are usually password protected, you should do some housekeeping and delete old backup/recovery/quarantine entries (older than two weeks or so), this will reduce the numbers of files that can’t be scanned.
By examining 1) the reason given by avast! for not being able to scan the files, 2) the location of the files, you can get an idea of what program they relate to. You may need to expand the column headings to see all the text. Files that can’t be scanned are just that, not an indication they are suspicious/infected, just unable to be scanned.
I don’t think not being able to access your firewall is related to this but it could be a target for a virus to disable it. Personally I think you should use another firewall one that provides outbound protection.
What other security based software do you have, e.g. Spybot S&D (TeaTimer), AdAware (AdWatch), SpySweeper, PrevX, WinPatrol, ProcessGuard, etc. ?
Whilst the windows XP firewall is usually good at keeping your ports stealthed (hidden) it provides no outbound protection and you should consider a third party firewall.
Any malware that manages to get past your defences will have free reign to connect to the internet to either download more of the same, pass your personal data (user names, passwords, keylogger retrieved data, etc.) or open a backdoor to your computer, so outbound protection is essential.
Zone Alarm free http://www.zonelabs.com works fine with avast and has a reasonably friendly user interface. There are others, Jetico, Sunbelt Kerio, etc.
See some firewall tests for comparison, some are freeware but many are paid for versions http://www.firewallleaktester.com/tests.php. Also see http://www.thefreecountry.com/security/firewalls.shtml