Hi, I'm running Windows 7 x64 as a guest on a Macbook Pro running Yosemite. Everything was running fine until I updated to PD 10.1.2. Now whenever I start an Office 2013 app in Windows 7 (Excel, Powerpoint, whatever..), I receive several dialog boxes with the following text: excel.exe - Bad Image C:\windows\system32\prl_umdd10.dll is either not designed to run on Windows or it contains an error. Try installing the program using the original installation media ... If I look at the Properties of C:\windows\system32\prl_umdd10.dll, it shows the file as signed by Parallels, Inc. on Dec. 19 and the signature verifies. So the file doesn't appear to have been corrupted. I uninstall Parallels tools, delete all of the files name "pro_*" in \windows\system32, rebooted and re-installed Parallels Tools but I still get the same thing happening. Anyone else seen this?