[TYPO3-english] Re: Cannot access backend from Install Tool

[Irene P]

OK, so I figured out the problem was the path. Fixed that and now I can access the backend. However, I ran into even more problems:

(1) The backend logs itself out regularly. When I try to reload the URL it just shows a plain file directory, not the backend. I tried navigating to the typo3_src-6.2.17\typo3\backend.php but it does nothing. So I have to navigate to typo3_src-6.2.17\typo3\sysext\install\Start\install.php to load the install tool again, and create ENABLE_INSTALL_TOOL file. Only then I can log on to the Install Tool, where I find the link to the Backend. How do I fix this?

(2) The typo3_src-6.2.17\Apache24\bin\httpd.exe stays open in the server, it looks like a DOS prompt. If I close it, Apache shuts down. Is there a way to close the DOS prompt without shutting down Apache? 
(Yes, I'm a non-techie)

(3) In the Backend, when I try to get or update extensions, I get the message "Update Extension List: Could not access remote resource (add http)repositories.typo3.org/mirrors.xml.gz." Retrieving (add http)repositories.typo3.org/mirrors.xml.gz from the command line works fine. So I tried all the steps highlighted in (add http)forge.typo3.org/issues/47135 but it still won't let me update the extension list. The steps were: install and enable cURL, disable sqlDebug, set allow_url_fopen = On. What am I missing?

Please help :(