While a program called MOVEONBOOT may remove this, your machine has SPYWARE and it's my policy to never allow such on my machine.
Light reading about parasites at http://www.doxdesk.com/parasite/
I cannot delete a file . It has 0 bytes . It is not checked " read only" or " hidden" when I check the properties. I was ripping and audio book to load to my MP3 player. I used Jet Audio Ver 6.0.4 with the MP3 extention pack . When I emptied the folder it gave me the error message "Cannot Delete File: Cannot read from Source File or Disk".It also will not let me rename the file or do a drag and drop to the recycle bin. Even when I restarted my computer it still would not delete .I am using XP Pro
One of the issues is that 3 tools may not find it. For instance, what Adaware and Spybot doesn't find may be spotted with Cwshredder.
As to the file missing on boot, be sure about it and learn how to use the RECOVERY CONSOLE for that day you need to delete a file that just won't go.
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