Hi I have a spreatsheet that has allot of information in it yesterday (27th
January 2007) I added some data and saved it then closed it. Today I opened
it to add some more data to it then all it had was a google ad in it?

This is what it said:
"Unsecured personal loans - Unsecured loans upto $20,000
Apply online today at financepoint www.financepoint.co.nz

Ads by Google Advertise on this site"

I scanned my computer for viruses using the free online scanner from live
one care then using my AVG with the latest definitions. Also scanned with
adaware and spybot but it found nothing. Why did this happen also a file
appeared in the folder where my spreadsheet is saved called "AA540000"