Dilyn

Alright so THIS time... I got Steam installed, no problem.

But, when Steam tried to update (happened automatically immediately after install) I got this error:

Steam.exe (main exception): ERROR: deleted Steam.exe but the file is still there

And the only option is "OK".

Then, when I relaunch Steam, I get this:

Error 1310. Error writing to file C:\Program Files\Steam\Steam.exe. Verify that you have access to that directory.

Then I get three options:
Cancel, Retry, and Ignore.
When I hit retry, I get the same error.
When I hit ignore, I get this:

Error 1722. There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor.

And I have one option: OK.
Then It says Fatal error during installation.