You can quickly collect this from the command prompt using WMIC (as long as you are using an operating system newer than Windows 2000).

This command-line utility (Wmic.exe) is used to access Windows Management Instrumentation (WMI) and saves you having to write a script to gather information by means of WMI. Wmic.exe can only be used by the local system administrators.

A Description of the Windows Management Instrumentation (WMI) Command-Line Utility (Wmic.exe)

To collect the list of installed hotfixes, run something like:

WMIC  QFE  LIST  FULL /Format:HTable > C:\Temp\HotfixList.HTM

and look at HotfixList.htm afterwards.