There is already a question on this but for some reason the thread is locked (!?) without an answer being given. I am experiencing the following when installing Lenovo's ThinkPad Bluetooth with Enhanced data Rate Software II for Windows 7 (32-bit, 64-bit), Vista (32-bit, 64-bit) - ThinkPad (http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-70042#os): Error 1935: An error occurred during the installation of assembly 'policy.8.0.Microsoft.VC80.CRT,type="win32-policy",version="8.0.50727.42",publicKeyToken="1fc8b3b9a1e18e3b",processorArchitecture="x86".Please refer t... Then rolls back actions and I end up with a system that gives me: BTTray.exe System Error The Program can't start because btwhidcs.DLL is missing from your computer. Try reinstalling the program to fix this problem. Of course re-installing does not help. The fix suggested in the previous version of this question refers to http://support.microsoft.com/kb/970652 . However I do not have Visual Studio (and frankly do not see how that is going to solve my Bluetooth installation issue). For the record I have Microsoft .NET Framework 4 and Windows 7 SP1. A luta continua

Hi Edwin, check this: Error 1935.An error occurred during the installation of assembly 'Microsoft.VC90.ATL,version http://support.microsoft.com/kb/970652 and run the following tool to fix: http://support.microsoft.com/default.aspx?scid=kb;EN-US;946414 André"A programmer is just a tool which converts caffeine into code" Want to install RSAT on Windows 7 Sp1? Check my HowTo: http://www.msfn.org/board/index.php?showtopic=150221