I have a dual boot Windows XP pro and Windows 7 home premium. The systems are on separate physical drives, and both the drives have an additional logical partition.On the additional partition of XP, there is a folder of old files, rarely used, all data of various types. I tried to access it while running an XP program, and got a warning "access denied". I went into Explorer, and that indicated that all 3 subfolders were empty.I rebooted in W7, and Explorer indicated that all files were there, I opened several no problem. Chkdsk run in XP indicated no problems.Since I do not often look at the folder, the problem could date to crashes I had in W7 a month ago.At this time, problem is "solved". In W7, I created a new directory on the same partition, copied the subfolders, and went to XP, where all read OK! My question: what chance this is some further failure waiting to happen? Has anyone else seen this sort of thing?The physical drive appears OK in SMART, and is about 1-1/2 years old. Needless to say, the drive letters are different between systems, so I identify them with names. I think I have the answer, a day later. I found another folder with the same XP problem, so I moved it, and got a message, that it would no longer be shared. (that was done for a laptop) All the folders with the problem were shared, so that means if you allow share in W7, access is denied in XP!1 person needs an answerI do too

Answer to problem; W7 and XP handle sharing differently. I went into "sharing" in properties of the folder in W7, and added "everybody", and now the folder is back and able to be read in XP.