Go to HKCUSoftwareMicrosoftWindowsCurrentVersionPoliciesUninstall
Change the DWORD NoAddRemovePrograms to 0 disable it
4096 - 32megs of memory or less
8192 - 32+ megs of memory
16384 - 64+ megs of memory
32768 - 128+ megs of memory
65536 - 256+ megs of memory