How to prevent the installation of software and IE extensions / toolbars, etc.

I try to help a small business at home with a Windows 7 PC with IE 9. The PC is used for normal business purposes: Microsoft Office documents, e-mail (AOL app), video editing and burn them on DVD or download YouTube and Vimeo, and research in Internet Explorer for commercial use normal and legitimate

My questions are (explained later):

All the PCs here have parental control of Microsoft and Microsoft Security Essentials installed. None of the PC should be able to be used for something ELSE (not only internet) between midnight and 08:00.
1. How can I get Internet Explorer 9 on Windows 7 automatically restore the State by default when it is closed? As if it were a PC in an internet café, library or school? This allows to avoid the (intentional or accidental) installation of toolbars, extensions, etc. in IE 9, if possible, I'd like to keep Google as the default search provider and homepage; In addition, the extensions 'regular' such as Flash Player, Real Player and Acrobat Reader must remain in place and JavaScript should work.
2. the son managed to resume using his own PC (and perhaps the PC business) at limited hours. I guess he got Windows 7 SysInternals disk to remove the administrative password. Is there a way I can stop that then reapply restrictions? Maybe he simply restored the system from the recovery partition or reinstalled Windows, so I need a way to prevent these things from happening as well. A firmware password would do the trick?

This probably wouldn't have happened if there was a way to allow installation of the software on a Standard account. On the own PC of the son, it's okay if it installs the software, browser toolbars and so on--even if it is malware. It is only the PC that should be free of this professional. It is also possible that it has installed this junk on the Professional PC as a form of punishment.
It is not possible to force users to use Firefox or Chrome instead of IE. And IE suffered from some bad extensions that were installed in Chrome.
Explanation:
The owner of the company adult son uses this PC occasionally working for the company, but mostly for its own use. The son, who can be a little mentally ill and lives with his father in the House where the business is, continued installation providers extensions, toolbars and search for malware, unwanted, unsafe in Internet Explorer and change the homepage. Office workers may have also unintentionally installed some malicious software search engines.
Occasionally, the son works for the company, so must have the PC of the company. However, he often uses the PC for its own purposes, which includes things like trying to download protected content (movies, television and music) without having to pay for it. It seems that he sometimes spend time free looking for games. (Before I put on the parental control, it had installed several of them. There still frequently installed toolbars, extensions and search providers in Internet Explorer to facilitate this [protected media download] and [probably] some of them gets simply by visiting the types of malicious websites that claim to offer free stuff. The son has four pieces of his own, which are almost unusable due to multiple malware infections.
Owner of the company I was install the parental control on the PC of the son in addition to the PC business to prevent the use of any computer between midnight and 08:00 when the son is supposed to sleep or study and not play games or use the computer for something ELSE. According to the owner of the company, the son psychiatrist said that the son must sleep during those hours every day.
Currently, it is not possible for me to question the son - it is of course very unhappy about not being able to install software on PCs own hie. Not that I was all happy that all this, but he isn't one to pay me.
Sorry, this has been so long. The situation is a little stressful.

A knowledgeable user can bypass/get around any account login admin password, by using any method found in a search on the internet.

You can try to set up separate for normal use restricted user accounts.

You can also configure another admin account, with the reset/recovery disk of password for your own use. (In which case a user causes problems in their attempt to circumvent restrictions)

Assuming that PCs are networked / connected via a routor, a decent has the ability to restrict the sites accessible both to prevent net access between certain hours, on a per PC basis.

There is software of third parties, such as used on some PCs consulted by the public in the scenario you mentioned, although how it would affect normal business type useage I could say.

Certain third-party Internet security applications also have the ability to restrict access/use their own parental controls

Tags: Windows

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