1
00:00:01,130 --> 00:00:09,900
Long number 8 and out-of-date virus scanner is only marginally better than those scanner at all.

2
00:00:10,100 --> 00:00:11,740
This is still very true.

3
00:00:12,870 --> 00:00:15,100
It could use a bit of generalization though.

4
00:00:16,060 --> 00:00:21,460
Nowadays scanning programs protect not only against viruses but also against all kinds of unwanted and

5
00:00:21,470 --> 00:00:22,830
hostle software.

6
00:00:24,270 --> 00:00:27,040
This is the function of modern anti-virus software.

7
00:00:30,280 --> 00:00:37,880
Anti-virus programs compare file signatures to the database of known viruses.

8
00:00:37,950 --> 00:00:42,160
If the database is outdated the scanner will no longer give you real protection.

9
00:00:47,370 --> 00:00:52,800
In order for a scanner to work properly its manufacturer must get a copy of a virus and create the virus

10
00:00:52,800 --> 00:00:55,470
signature.

11
00:00:55,470 --> 00:01:00,720
This is becoming harder and harder because computer viruses can mutate every 10 minutes and each new

12
00:01:00,720 --> 00:01:02,720
copy has a slightly different code.

13
00:01:06,130 --> 00:01:11,260
YIANNA virus software manufacturer has to test the virus signature and upload it to the internet.

14
00:01:14,850 --> 00:01:18,830
Your copy of the anti-virus scanner will then download it.

15
00:01:19,060 --> 00:01:22,080
Only then will the scanner protect your system against malware.

16
00:01:26,230 --> 00:01:31,380
It takes days and sometimes even weeks before virus signatures are available on the Internet.

17
00:01:33,140 --> 00:01:36,900
While number 8 in a more general form is still valid.