In about 50% of the cases I try to launch TrueCrypt 7.1 (portable) it causes Windows 8.1 Pro x64 RTM to get unresponsive to TrueCrypt. In fact the program hangs, and cannot be stopped either. Also in Taskmanager this cannot be done: it says that it is in use and therefor cannot be deleted/wiped from memory. I noticed that, although the rest of Windows and the open programs still work, the overall stability of Windows 8.1 is undermined, and to my idea this gets worse as the time passes by I continue using Windows. The only thing to solve this is to shut down Window 8.1 and to restart it. Only then TrueCrypt is removed from memory, and I can try all over again to launch it: this is so boring... Is there a solution to use TrueCrypt 7.1 in a proper way in Windows 8.1? The FAQ-section on the site of TrueCrypt doesn't say anything about a possible problem in using it on Windows 8.1.