I can't count the number of times I have had to re-take ownership of folders on my system. It just won't stick. These are folders that meant to be written to- like AppData/Local/Temp and My Documents, My Music, Desktop etc. It's causing havoc. I really like Windows 7 and I enjoy problem solving and beta testing, but this is a serious bug. I'm using the MS official beta 7000. I started with a clean install but recently did an upgrade-style reinstall to try to solve this. The problem recurred My user account is a member of Administrator group. I have added take ownership to the R click context menu because I have to reclaim ownership of some folder several times daily. Take ownership works but something somewhere is countermanding it. Any suggestions?