I Kid U Not.

"So how does one know if the slow PC response is down to a rootkit or just the usual Windows problems ?"

One doesn't, AC. That is ITs Stealthy Grace. If you want to Imagine anything, consider IT, a Binary AIDS VXXXXine ....... Right to the Heart of Man's Woes and Follies........ The Pleasure and the Pain in ITs Not Giving ....... The Ultimate Betrayal to Oneself which Denies One the Keys to the Kingdom Castle....... Seventh Heaven, Global Communications HQ.