I was trying to install Simply Accounting Premium 2009 by Sage Software onto Windows Vista last week and couldn't get it to install properly. At the beginning of the setup process, it told me that Windows Vista or an anti-virus program was wanting to upgrade and that I should restart my computer.

It was basically having firewall problems and the firewall was not letting me install certain files.

I tried restarting it several times and it didn't work. I also updated Windows Vista, which took a few hours, and it still didn't work. Exasperated, I decided I'd downgrade to Windows XP. That's a long story that I won't share, but suffice it to say, Acer computers won't let you downgrade.  I tried going online to find some Windows Vista help or Windows Vista support.

Anyways, what was the final solution? I just turned off my McAffee Antivirus program, which immediately solves the firewall problem, ran the installation of Simply Accounting Premium 2009 onto Windows Vista, then turned the McAffee program back on. It worked!!

I couldn't find anyone with the solution on the internet, so I thought I'd post it in case it could help someone out.

If you find someone on a Windows Vista help or Windows Vista support page or forum that has this problem feel free to share or send them this article.

Windows Vista has had a long and sorted history of problems.  After several years of delays in it's launch, when it finally came out, it was riddled with problems.  There were entire multi-national companies, after the troubleshooting started to eat into their productivity chose to downgrade all of their computers back to Windows XP.  Hopefully Windows 7 will be a lot better, and hopefully they'll do some bug testing before they release it.