AAAAggg! Something is wrong is Japanese typing.
I will describe my problem in English now...

I installed linux on my laptop (Pentium II 266MHz).
But compared to Windows on the same machine, linux
is very very slow. So I looked /proc/cpuinfo (see below)
and see only 134 MHz is recognized (?). Is this true?
If so, how can I fix this. Otherwise, why is Windows
much faster?

# /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model  : 5
model name : Pentium II (Deschutes)
stepping : 2
cpu MHz  : 134.359
cache size : 512 KB
fdiv_bug : no
hlt_bug  : no
f00f_bug : no
coma_bug : no
fpu  : yes
fpu_exception : yes
cpuid level : 2
wp  : yes
flags  : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr
bogomips : 264.60