Son's PC (AMD 700, W98SE) has over a thousand .idx files in the Docs folder. I have done a Google but have found nowhere saying to keep or discard these files. He does Halo and Diablo on the net. Also burns music CDs.(legally) Some found threads say these files are from: Outlook(not used),Incredimail(not used),different databases(not used) and from the only one he does use,Nero. But not a single mention if they are safe to delete. Any advice would be appreciated.