Since you don't believe me I decided to make a little video and upload it to http://www.youtube.com/watch?v=n6kEWaBucCE. I have been able to go further but it takes a good deal of time and is the reason why my computer got screwed up.
PS. I have had many other issues over the years on different OS's but one thing is the same and that is I have never been able to get into Steam at all. A few months ago my problem was different and instead of this the program just wouldn't start, the time before that it refused to update at all, and the time before that it was really bad and would instantly crash my computer.
PPS. Also Steam is the only program I have trouble with other then programs that have compatability issues with Windows 7 and even then most of them I get working. The only programs (besides Steam) I have never gotten working were a couple of games I have that were made for Windows 9x.
This is an odd problem I actually had myself a few years back.
1) Before installing Steam, temporarily disable the programs on https://support.steampowered.com/kb_article.php?ref=9828-SFLZ-9289.
2) What generally works:
Start menu-> Run -> Services.msc
Find "application experience" service and click properties
Set the Startup Type dropdown box to Automatic.
Click the 'Start' button at the bottom of the dialogue.
Click OK.
Try to install Steam again. Meantime figure out exactly which one of the programs you have installed is disabling this service and get rid of it.
3) The obscure fix, only if the above fails:
1 - Install steam from SteamInstall.msi
2 - When the progress bar reaches 100% and prompts you to search for updates, DO NOT CLICK FINISH. Ctrl-Alt-Delete, task manager and close EVERY process related to msiexec
3 - Reboot and enter "safe mode with network support" (press F8 after BIOS disappears to bring up boot menu. Alternatively, if you fail at pressing at the right time just yank the power cord and it should appear when you reload.)
4 - Run Steam.exe manually from its install directory, the update should complete successfully