cannot upgrade

[Guest]

Hi when i try to install vista after entering product key i get a screen were
the upgrade option is not available. it says that setup failed to run upgrade
compliance checks. It appears to go online but only for a second then
proceeds to entering product key. i have uninstalled mcafee and turned off
everything else running on boot up but still the same. please can you help?
upgrade advisor does not find any problems.

 

[Mark D. VandenBerg]

Are you trying to install x64 or x86? Are you trying to install on a
computer with SATA drives? A little system information would be most
helpful in the future.

 

[Guest]

i am trying to install x86 on a standard drive. i have an asus A8N-sli deluxe
mobo, amd 55fx with geforce 7800 gtx graphics card. 1 gig of memory. Any help
would be appreciated. Thanks

 

[Jane C]

Are you installing by booting from the DVD or from within XP? Upgrade
option should appear if you start the install from within XP.

 

[Guest]

i am upgrading from within xp, something is obviously preventing me, but am
unable to discover what.