Just found the below on the Guru3D forum for the menu lag. I haven't tried it yet myself though.

Originally Posted by HeavyHemi
I just found this fix over on the EVGA forums. As always back up your registry before doing any modification. I performed this myself on Vista 64 Ult and it worked perfectly to eliminate context menu delay. What I did was first delete the context key then create the command key. No reboot required to test.

Navigate to

HKEY_CLASSES_ROOT\Directory\Background\shellex

Delete: NvCplDesktopContext key and all is good, now right click is fast as ever. If you need the Nvidia Controle Panale

all you have to do is select it from Programs and Features.

Ok now the fun part; for all of you who want the context menu this is how you add it back without the delay:

HKEY_CLASSES_ROOT\Directory\Background\shell

then Right click on Shell and add new Key: Name that key Nvidia Control Panel

Then Right Click on that new Key and add a new Key: Name this Key Command

Then with the new key Command selected in the right hand pane double click the Default Value Key and type:

c:\windows\system32\nvcplui.exe

This will fix your Context issue....

This is how the key will look: (By the way you can copy all of that out and past in a text document and rename to .reg

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\Background\shell\Nvidi a Control Panel]

[HKEY_CLASSES_ROOT\Directory\Background\shell\Nvidi a Control Panel\Command]
@="c:\\windows\\system32\\nvcplui.exe"