MySQL Configuration On Windows Vps

mysql configuration..

I'm on a windows vps with 640mb of ram and I'm always at high level of usage of ram and 100% of cpu.. obviously the website slows down and it takes about 15 seconds to show up!

I've tried to put some indexes to my db but I'm not really expert in that.
I've been also told that my problem could be caused by a wrong mysql configuration, so here it is mine:

Code:
# The MySQL server
[mysqld]
; Uncomment for use on USB key
; skip-innodb
datadir=${path}/mysql/data
basedir=${path}/mysql
bind-address=127.0.0.1
port = 3306
socket = /tmp/mysql.sock
skip-locking
key_buffer = 200M
max_allowed_packet = 1M
table_cache = 200
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 3M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 2

# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin

# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[isamchk]
key_buffer = 100M
sort_buffer_size = 100M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 100M
sort_buffer_size = 100M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout