Hello, clean installed windows 7 64 bit, if I enable my usual setting in speed up my pc, although pc seems fine it logs the last system shutdown was unexpected in event viewer and performance monitor, I am sure it never used to do this?

I enable dns cashe improvment, cpu scheduling, force windows to ram, and disable dos stamp.

any ideas what is causing this please?

only other realtime program is avast internet security.

jv16 2011 2.0.0.1053

Thanks