Log files in the system32\log files folder

Need to free up diskspace on the c:\ of a Window2003 SBS Server.
there is over 1GB of text log files in the c:\windows\system32\logfiles folder
the subfolders from there are W3SVC1 and W3SVC4
the text files are name ex(date).log     so for example ex101008.log
they date back to the beginning of the server's life
Are they safe to delete?  Here is an example of what is in part of one

#Software: Microsoft Internet Information Services 6.0
#Version: 1.0
#Date: 2008-10-04 00:00:03
#Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status
2008-10-04 00:00:03 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:03 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:03 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:13 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:13 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:13 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:16 192.168.1.1 GET /secars/secars.dll h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mc 200 0 0
2008-10-04 00:00:16 192.168.1.1 POST /secars/secars.dll h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mc 200 0 0
2008-10-04 00:00:18 192.168.1.1 GET /secars/secars.dll h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mc 200 0 0
2008-10-04 00:00:23 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:23 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:23 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:33 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:33 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:33 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:43 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:43 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:43 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:47 127.0.0.1 GET /secars/secars.dll action=238 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:53 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:53 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:00:53 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:01:03 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:01:03 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:01:03 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:01:13 127.0.0.1 POST /secars/secars.dll action=235&reset=1 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:01:13 127.0.0.1 GET /secars/secars.dll action=36 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:01:13 127.0.0.1 GET /secars/secars.dll action=38&usn=18 80 - 127.0.0.1 Java/1.5.0_14 200 0 0
2008-10-04 00:01:15 192.168.1.1 GET /secars/secars.dll h=A11AAD19352CCE55EF306D605786D8C8CA224C2F45AC3FDDA63D2196981BE5461C4C189D47DAEA8A0B9A59981C45FA0E2C2FBC6DDFDD6B6B934E625468E6F2E020C67A8266A0C03
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ThorSG1Commented:
The folders W3SVC1 and W3SVC4 correspond to websites.  You need to ask yourself what type of logging you need on your websites.
The number after W3SVC corresponds to the Identifier number for the website.

Open the properties of one of your websites.  On the first tab: Web Site there is a section checked Enable logging.  In that section there is a properties button.  Hit that.  You are able to define how often the logs are overwritten or if at all.  You can change the location of the log files if you have a better location.  Say another drive with free space available.  Under the Advanced tab you can choose what you want in the log file.  This will cut down on how much space is being taken up.

I don't recommend turning logging off completely.
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