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.
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 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.
I had a spare 750 Gig HDD, after recently upgrading a new laptop with an SSD. The spare drive contained an installation of Windows 7 x64 (from HP). I simply inserted the spare drive (after adding it to a drive bracket, and some creative hole drilling) and my Dimension C521 booted just fine. After the initial boot it had to reboot a number of times as Windows adjusted the drivers that were in use.
Ironically I spotted an update to the Dimension's BIOS; originally it was on version 1.1.8, and the newest BIOS is 1.1.10. Before upgrading the BIOS I thought to myself 'Don't fix what isn't broken', however I upgraded nonetheless! The C521 will no longer boot into the pre-installed Windows disk. I have even attempted a fresh install of Windows 7 but again I am not having any luck.
ADVICE: If you are attempting this and don't have BIOS version 1.1.10 don't bother getting it...in all likelihood it will just make your life harder.
I am going to attempt to find the older BIOS version, and install it. That failing I can see Ubuntu Linux in my Dell's future.