Now i have cheked the event viewer/ applications and there is constantly repeating error:
Faulting application svchost.exe, version 5.1.2600.2180, faulting module netapi32.dll, version 5.1.2600.2180, fault address 0x0000a3c0.
in the \system there is also reapeting massage:
The browser service has failed to retrieve the backup list too many times on transport \Device\NetBT_Tcpip_{ECFBA1BB-44CF-45BC-9F6E-3F64546C93E5}. The backup browser is stopping.
i am running winxp sp2. I have no idea how to repair this thing i would be glad if anyone can help me.