Kerstin: in my first response to this thread you started I asked you some questions (Nov

which you still haven't answered, the answers to some of those and the output posted to this thread might help you resolve your problem. We need some more details from your system to help you.
Also, are you multi-booting that machine and if so, do you get the same slow response on other distros? Try a Live Linux CD, such as Slax, and see if you get the same poor performance from opening programs.
There seems to be a definite network problem. Please post the output also from the following commands run as root in a terminal:
ifconfig
route -n
cat /etc/resolv.conf
cat /etc/rc.d/rc.inet1
cat /etc/rc.d/rc.inet2
Sorry about that, believe me that i appreciate all the help.
ok here we go:
root:# ifconfig
eth0 Link encap:Ethernet HWaddr 00:10:DC:F3:CB:50
inet addr:83.XXX.XX.127 Bcast:83.XXX.XX.255 Mask:255.255.255.0
UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
RX packets:800 errors:0 dropped:0 overruns:0 frame:0
TX packets:756 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:513268 (501.2 KiB) TX bytes:263437 (257.2 KiB)
Interrupt:19 Base address:0x6d00
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
root:# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
83.XXX.XX.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 83.XXX.XX.1 0.0.0.0 UG 0 0 0 eth0
root:# cat /etc/resolv.conf
# Generated by dhcpcd for interface eth0
nameserver 82.209.169.71
nameserver 82.209.169.72
root:# cat /etc/rc.d/rc.inet1
#!/bin/sh
# This file is supposed to be created by vnetadd
# and modified by vnetset.
# You can modify it by hand, but be careful ;-)
#
# GNU GPL (c) Eko M. Budi, 2004
# (c) Vector Linux, 2004
#
###########################################################
## The settings
DEVICE='eth0'
DHCP='yes'
IPADDR='127.0.0.1'
NETMASK='255.255.255.0'
GATEWAY=''
PROBE='no'
###########################################################
## The script
## You may make customized script here
## If not, source the standard network
. /etc/rc.d/functions-network "$@"
Edit: I ran ubuntu live-cd and everything is ok there.