Hi Jim57,
When you say Acrobat stops working what exactly does it do?
Do you see any error messages?
Is Adobe Acrobat updated to the latest patch?
You can even try the following and check the performance :
> Enable the hidden Admin Account on Windows 7 ( Ref : http://www.howtogeek.com/howto/windows-vista/enable-the-hidden-adminis trator-account-on-windows-vista/ )
> Disable all Non-Microsoft Startup Services. (Ref : http://helpx.adobe.com/x-productkb/global/disable-startup-items-servic es-windows.html )
> Disable all the Antivirus softwares like CA, Norton,Mc Afee etc. temporarily from the computer.
Reboot and try installing in the new enabled Admin user account and check.