To check details of the installed memory, there's a WMIC batch file available at
Sysnative, it's #24, "wmic memorychip". (72 files there in total.) I use the text file output versions.
#44 will "List Windows Updates/ Hotfixes", which might help you work out which ones you might need, this years updates are listed
here <- it's a big list for all supported Windows versions, most recently issued are top, yesterday's releases only contained 3 for W7, you'll be pleased to know
. From the KB links given, you should be able to find the direct download so you won't
have to rely on WU.