I Put my PC to sleep when i'm done using it for a bit, then when i go to wake it up to use it again, it will not wake, therefore causing me to reboot it every time, which gets annoying and i'm sure is not too good for the computer either. If anyone, knows what to do, i would really appreciate help. I'm running an:

Authentic AMD
AMD Athlon(tm)XP 1600+
256 MB RAM

thanks for any help

I had the same problem, dunno what caused it but re-installing windows did the trick.