I searched through the threads and didn't find any mention of the problems I was having so I thought I'd post it in case anybody else is having these problems. I had run VMware Player many times before on my old Dell 530. It was slow, but usable. I got a new Dell i5 with Win 7, 64 Bit, 8GB and was looking forward to installing a virtual machine and running some software in it a bit faster than the old 530. Unfortunately I was in for a big disappointment. When I attempted to install VMware Player I got this error message regarding insufficient privileges. The version was VMware-player-6.0.2-1744117 I tried running as an administrator, same message but with a different 10 digit temp file name. Then I ran Explorer as Administrator, and right clicked the file and ran that as Administrator. No joy, same error message. I thought maybe the version of VMware Player I was trying to install was outdated, on not compatible with a 64-Bit installation, so I went to the web site and download the latest and the greatest 64-Bit version (VMware-player-7.1.0-2496824-64-Bit) and attempted to install it. The error message I got was just made no sense. Somewhat annoyed that I couldn't install anything, I went over to VMware's web site looking for some answers, but it was no help at all. But a search of the first error message turned up many instances of other programs not being able to install because of "insufficient privileges". All seemed to point to the C:\ProgramData directory as the problem. Normally that directory is protected and not accessible, and I like to leave it that way, since I'm pretty sure that everything in it is a link to somewhere else, and not a real directory or sub-directory. Anyway, I removed the permission restrictions and checked to see if Start Menu directory had the correct settings. It did not, so I changed them to include the Groups Everyone and System and gave them Full Control. I tried to install the Player again, and it didin't work. But after a bit more searching on line it seems that you have to go one level deeper to the Programs sub directory. When I looked at that one there was only one entry for permissions, and that was me. No System or Everyone group (??). I added both of them, gave them Full Control, and selected the check box to apply permissions to the sub-directories and clicked OK. When I ran the Players installation routine it went to completion, and I installed the latest version of Windows 10 TP and everything is working as I would have expected it to, without the monkey drill. BTW, none of the other software that I installed, had this problem. I'm baffled as to why I had such a tough time installing VMware Player. Edit: I just noticed. This is my 100th post on MDL .