When attempting to upgrade from Windows Vista to Windows 7, after 2 hours the upgrade fails with the message “This version of Windows could not be installed, Your previous version of Windows has been restored.
I ran the compatibility download test from Microsoft and it did not inform me of any serious problems !!!
Error report only has programs that might not work. This should not prevent the install.................
These programs might not work properly after the upgrade. We recommend uninstalling these programs before upgrading. Cancel the upgrade, open Control Panel, and search for "uninstall a program". (Note: Programs marked as * can be safely reinstalled after the upgrade.)
PhotoDeluxe Home Edition 3.x
nVidia Display drivers/nView Desktop Manager (NVIDIA Drivers)
I went to the Dell site and it does not show the Dimension as compatible with Win7 but does not indicate WHY.......
Actually, some of those systems of mine that failed the upgrade had to have the Mcafee AV Enterprise 8.5.0i client uninstalled before the upgrade would even begin. Windows 7 setup literally would not continue until Mcafee was completely removed.
Applications can prevent upgrades from occurring. Remove the applications the report indicates and try the upgrade again.
December 8, 2009 5:06:25 PM
I have downloaded and have been using Windows7 for about a month. It has worked just fine until about 2 weeks ago. I have eliminated the problem down to the BIOS. the latest version of Dell BIOS for C521 is not compatible with Windows 7. I run the OS for about 30 minutes until it either freezes or slows WAAY down. I am waiting for Dell to update their driver software but not holding my breath. I would wait a while until all the hiccups are resolved.
i cant install it i get error message when at 70%it says im missing programs it needs to install it where can i get those from dell?
January 14, 2010 7:59:23 PM
i installed windows 7 64 bit edition on my demension c 521 the day 7 came out and i havent had any problems since. im not sure what could be the cause of your problems but i thought i would just throw this out lol
My C521 would hang at the Windows 7 splash screen during install. Finally read elsewhere to remove 2GB RAM from 4GB setup so that system only had 2GB. Also change HDD performance in BIOS from BYPASS to Performance. Whatever it was, I am now able to finish loading Win7.