network baglantıs niye sürekli kopar?

arkadas merhaba,

 benim yaşadıgım sorun son zamanlarda iyice sıklaşan agdan kopma sorunu. hic bir degişiklik yapılmadıgı halde aga baglı cihazların ağ baglantısı gidiyor. ve akabinde geri geliyor. ( cok uzun bir sure degil 5- 10 saniye kadar) bilgisayarlar dosyalar programlar cevrimdisi oluyor. hatta ag yazıcısı var o bile cevrimdisı oluyor. burdaki yapı bir domain altında iceriye dogru hizmet veren bir dns sunucu, file server, data server ve birde terminal server var. yanlız butun bu hatalı işlemler oldugu zamanda dc loglarında sadece aşagıdakiler yazıyor. sorun nerde olabilir. nerelere bakmam gerekir.

 Type:        Error
Date:        08.09.2008
Time:        13:49:12
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver KONICA MINOLTA magicolor2300W required for printer !!NesrinPc!KONICA MINOLTA magicolor2300W is unknown. Contact the administrator to install the driver before you log in again.

Type:        Error
Date:        08.09.2008
Time:        13:49:12
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver HP Officejet 4300 series required for printer !!satinalma!HP Officejet 4300 series is unknown. Contact the administrator to install the driver before you log in again.

Type:        Error
Date:        08.09.2008
Time:        13:49:12
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver Send To Microsoft OneNote Driver required for printer OneNote 2007'ye Gönder is unknown. Contact the administrator to install the driver before you log in again.

Type:        Error
Date:        08.09.2008
Time:        13:49:11
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver Microsoft Office Live Meeting 2007 Document Writer Driver required for printer Microsoft Office Live Meeting 2007 Document Writer is unknown. Contact the administrator to install the driver before you log in again.

Type:        Error
Date:        08.09.2008
Time:        13:49:11
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver Microsoft XPS Document Writer required for printer Microsoft XPS Document Writer is unknown. Contact the administrator to install the driver before you log in again.

Type:        Error
Date:        08.09.2008
Time:        13:49:10
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver Adobe PDF Converter required for printer Adobe PDF is unknown. Contact the administrator to install the driver before you log in again.

Type:        Error
Date:        08.09.2008
Time:        13:49:10
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver Generic 25C-1/25C-1P PCL required for printer Generic 25C-1/25C-1P PCL is unknown. Contact the administrator to install the driver before you log in again.

Type:        Information
Date:        08.09.2008
Time:        13:43:00
Event:        7036
Source:        Service Control Manager
Category:    None
User:        N/A
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service entered the running state.

Type:        Information
Date:        08.09.2008
Time:        13:43:00
Event:        7035
Source:        Service Control Manager
Category:    None
User:        \SYSTEM
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service was successfully sent a start control.

Type:        Information
Date:        08.09.2008
Time:        12:49:42
Event:        7036
Source:        Service Control Manager
Category:    None
User:        N/A
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service entered the stopped state.

Type:        Information
Date:        08.09.2008
Time:        12:49:42
Event:        12517
Source:        WinHttpAutoProxySvc
Category:    None
User:        N/A
Computer:    YILDC
Description:
The description for Event ID ( 12517 ) in Source ( WinHttpAutoProxySvc ) could not be found. It contains the following insertion string(s): .

Type:        Information
Date:        08.09.2008
Time:        12:49:42
Event:        12503
Source:        WinHttpAutoProxySvc
Category:    None
User:        N/A
Computer:    YILDC
Description:
The description for Event ID ( 12503 ) in Source ( WinHttpAutoProxySvc ) could not be found. It contains the following insertion string(s): .
15

Type:        Information
Date:        08.09.2008
Time:        12:33:12
Event:        7036
Source:        Service Control Manager
Category:    None
User:        N/A
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service entered the running state.

Type:        Information
Date:        08.09.2008
Time:        12:33:12
Event:        7035
Source:        Service Control Manager
Category:    None
User:        \SYSTEM
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service was successfully sent a start control.

Type:        Information
Date:        08.09.2008
Time:        12:00:00
Event:        6013
Source:        EventLog
Category:    None
User:        N/A
Computer:    YILDC
Description:
The system uptime is 485870 seconds.

Type:        Information
Date:        08.09.2008
Time:        11:27:12
Event:        7036
Source:        Service Control Manager
Category:    None
User:        N/A
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service entered the stopped state.

Type:        Information
Date:        08.09.2008
Time:        11:27:12
Event:        12517
Source:        WinHttpAutoProxySvc
Category:    None
User:        N/A
Computer:    YILDC
Description:
The description for Event ID ( 12517 ) in Source ( WinHttpAutoProxySvc ) could not be found. It contains the following insertion string(s): .

Type:        Information
Date:        08.09.2008
Time:        11:27:12
Event:        12503
Source:        WinHttpAutoProxySvc
Category:    None
User:        N/A
Computer:    YILDC
Description:
The description for Event ID ( 12503 ) in Source ( WinHttpAutoProxySvc ) could not be found. It contains the following insertion string(s): .
15

Type:        Information
Date:        08.09.2008
Time:        11:10:42
Event:        7036
Source:        Service Control Manager
Category:    None
User:        N/A
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service entered the running state.

Type:        Information
Date:        08.09.2008
Time:        11:10:42
Event:        7035
Source:        Service Control Manager
Category:    None
User:        \SYSTEM
Computer:    YILDC
Description:
The WinHTTP Web Proxy Auto-Discovery Service service was successfully sent a start control.

Type:        Information
Date:        08.09.2008
Time:        10:58:27
Event:        7036
Source:        Service Control Manager
Category:    None
User:        N/A
Computer:    YILDC
Description:
The DNS Server service entered the running state.

Type:        Information
Date:        08.09.2008
Time:        10:58:26
Event:        7035
Source:        Service Control Manager
Category:    None
User:        YIL\Administrator
Computer:    YILDC
Description:
The DNS Server service was successfully sent a start control.

Type:        Information
Date:        08.09.2008
Time:        10:58:25
Event:        7036
Source:        Service Control Manager
Category:    None
User:        N/A
Computer:    YILDC
Description:
The DNS Server service entered the stopped state.

Type:        Information
Date:        08.09.2008
Time:        10:58:25
Event:        7035
Source:        Service Control Manager
Category:    None
User:        YI**\Administrator
Computer:    YILDC
Description:
The DNS Server service was successfully sent a stop control.

Type:        Error
Date:        08.09.2008
Time:        10:57:20
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YILDC
Description:
Driver HP Officejet 4300 series required for printer !!satinalma!HP Officejet 4300 series is unknown. Contact the administrator to install the driver before you log in again.

Type:        Error
Date:        08.09.2008
Time:        10:57:20
Event:        1111
Source:        TermServDevices
Category:    None
User:        N/A
Computer:    YIL***DC
Description:
Driver KONICA MINOLTA magicolor2300W required for printer !!NesrinPc!KONICA MINOLTA magicolor2300W is unknown. Contact the administrator to install the driver before you log in again.