I am unable to install Parallels Tools. In parallels-tools-setup.log ( located in C: Windows/Temp ) the following errors appeared:
[G] [ToolsSetup] 2014-07-24 10.20.25 : Installer exited with error code 1625 [G] [ToolsSetup] 2014-07-24 10.20.25 : This installation is forbidden by system policy. Contact your system administrator.
Windows internal issue caused by incomplete Windows Updates installation.
NOTE: Please take a snapshot of your virtual machine (in Parallels Desktop menu bar go to Virtual Machine > Take snapshot...) before you proceed with the instruction below to be able to revert all the changes.
- Go to Start Menu > at the search bar type 'regedit' (without quotes) hit Enter to run Registry Editor.
Browse the registry to
**DisableMSI**, type: **REG_DWORD value = 0**
(0 should allow you to install updates. Originally it was 1) (In particular case the value might be set to 2 so just change it to 0)
For more information, please follow this Microsoft Forum page.