I've had the 'repeated' network adapter happen on XP even. Probably has to do with an incomplete delete of the driver/hw. If it bothers you, you can DISABLE it in Device Manager.
I looked through the 1/2 memory 'fixes' and found this piece,
Another way to do this and it saves more or your memory.
Saw this on the TechNet forum:
I have a little improvement for the temporary workaround that will allow us to use all the RAM minus 1 GB. In my case this is 7GB instead of the 2GB proposed by the original workaround.
Calculate your amount of memory in bytes in hexadecimal and substract 1 . You can use google to do the calculations or use scientific calculator. If you have 8GB like me just type in google (without quotes) "8 * 1024^3 - 1 in hexadecimal" and the result will be 0x1FFFFFFFF . For 6GB it is 0x17FFFFFFF and for 4GB it is 0xFFFFFFFF .
Type "bcdedit /set truncatememory 0x1FFFFFFFF " (no quotes) in an elevated command prompt if you have 8GB, or use the other hexadecimal numbers for other amounts of RAM.
You will have, depending on the number used in step 2, either 7GB or 5GB or 3GB available, but the problem is solved.
I have not tested it with higher amounts of RAM, but as I say with 8GB of installed memory and 7GB of available memory it works.
Thank you Mark for finding out the original solution.
It seems to be a slightly better option since you only loose a little bit of memory (1 GB loss vs 2 GB fixed max)
Looks like you can just decrease it by 1GB, not have to cut it in half.
You don't need a script. Just open NOTEPAD and put the BCDEDIT command in it and SAVE the contents to your C:\ with names like LESSMEMORY.BAT for the one that reduces it and FULLMEMORY.BAT for the one that restores memory. Then, on the desktop RMB and select NEW --> SHORTCUT. Now locate one, say LESSMEMORY.BAT and press OK and now type in REDUCE MEMORY and OK. You now have a desktop icon that you can select to reduce the memory. Do the same for the other one and call it RESTORE MEMORY. If you want to also reboot the system from the command, add this line, SHUTDOWN /r, to Notepad before you save the file.