hi peeps

yesterday, i was browsing my machine and what i found was, in most of the folders there were two folders I never heard of before. These were "folder.htt" and "destop.ini". In some folders, these were hidden but in some they weren't. Also, when I scaned my computer using AVG 7 and Mcafee 9, these werent detected as a virus! Although the folders were empty but I still doubt that they maybe some new kinda virus! Can someone help?