I have an Acer laptop running Windows 7 32 bit. I just finished reloading the operating system because it will "stop responding" when I try to open WORD, when I try to delete an icon on my desktop and when I try to print. Before I could restore to an earlier point and it would work, but then fail again in an hour, day or week. Does any one have a definitive answer as to what is causing this? Before the reload I renamed the CLASSpnp.sys file and it worked for a while, but then the same problems occured. HELP!!!