I'm having an intermittant problem with Windows Explorer, where it seems unable to operate, and I'm unable to reboot and am forced to use the power switch shutdown option. When I reboot in Reatore Directory Services mode, Windows Explorer will work normally, yet when I restart, it's back to square one. I have downloaded alternative RC suspecting a duff iso, but the problem persists. In addition, I have overall sluggish performance, much slower than my Vista Enterprise or Ultimate.My PC has an AMD Athlon x64 Dual Core @ 2.60GHz, 4Gb RAM, although due to AMD design limitations can only "see" about 3.2Gb x86 and 3.840Gb x64. The OS I am using is x64

longtallsally, I'm afraid that I can't do much for your problem directly, but you should only be downloading and installing the Windows 7 RC directly from Microsoft .-Alex

The Windows Explorer behavior when you use mouse or keyboard should be the same. The issue you described can be caused by third party programs or Windows Explorer add-ons. Clean boot=================Lets disable all startup items and third party services when booting. This method will help us determine if this issue is caused by a loading program or service. Please perform the following steps:1. Click the Start Button type "msconfig" (without quotation marks) in the Start Search box, and then press Enter.Note: If prompted, please click Continue on the User Account Control (UAC) window.2. Click the "Services" tab, check the "Hide All Microsoft Services" box and click "Disable All" (if it is not gray). 3. Click the "Startup" tab, click "Disable All" and click "OK".Then, restart the computer. When the "System Configuration Utility" window appears, please check the "Don't show this message or launch the System Configuration Utility when Windows starts" box and click OK.Please test this issue in the Clean Boot environment, if the issue disappears in the Clean Boot environment, we can use a 50/50 approach to quickly narrow down which entry is causing the issue.For more information about this step, please refer to the following KB article:If the issue occurs in Clean Boot Mode, you may use ShellExView.Important Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.Run ShellExView, in the pane sort the entries with manufacturers. Disable all non-Microsoft *.dll files, and check the result. If the issue does not occur, one of the files can be the culprit. We could narrow down it one by one. Arthur Xie - MSFT