"No Automated Querying
You may not send automated queries of any sort to Google's system without express permission in advance from Google. Note that "sending automated queries" includes, among other things:
using any software which sends queries to Google to determine how a website or webpage "ranks" on Google for various queries;
"meta-searching" Google; and
performing "offline" searches on Google.
I happened to have purchased a book recently that says I can look at links to my site by typing link: www.mysite.com
this works fine, but is this against their policy? I also found trials of at least two software programs that bring up links to a site. I am guessing these may be the type that cause the problems above, although I had no way of knowing all this before. There is no indication that they are trouble makers.
I guess I will have to delete those programs.