Many programs will not install under Windows 7 on my new laptop

I am having a problem that seems fairly similar to that which this woman had:

Trouble installing iTunes 9 on brand new laptop running Windows 7

Unfortunately, what fixed her problem doesn't work for me.

I brought this brand new laptop home from Best Buy earlier today and I am having many issues with Windows 7 Home Premium (64-Bit):

Toshiba Satellite® A665-S6070 Laptops

The first thing I did was install Mozilla Firefox, which went well. Then I installed the Kaspersky Anti-Virus software that came with the laptop, which also was successful. Then I wanted to install iTunes, and I downloaded the correct x86-64 version from the iTunes download website, but for some reason it refuses to do anything beyond the "Do you want to allow your computer to install this content?" screen. Just a few hard drive clicks and that's it. I tried to run the installer as Admin but it still doesn't work. Then, I tried uninstalling Firefox and Kaspersky, thinking that was it, but it still doesn't work.

I have noticed along the way that other pieces of software don't work that should. For instance, I thought maybe I needed to download/install Windows Updates, but it was able to install all but two of the updates. For some reason it keeps failing to install the Malicious Software Removal Tool and another one I can't remember.

I also found that .Net Framework 4.0 fails to install, exiting before the installation begins as a result of an "unspecified error" (very useful info).

I looked up online that maybe this was a result of the Customer Experience program that Windows 7 runs in the background, and there was a guide to remove the registry keys from the registry in order to disable this, but that didn't help either. I get the same problem.

Kind of bizarre, really.

Any help you could give me would be gladly appreciated.

When it comes to receiving a brand new laptop, the first thing I would do as a general rule is a clean install of Windows 7 (or whatever OS it came with) because a lot of times, all the crudware they include screws the laptop up big time.

I came home from work today determined that if none of the installs worked then I would re-install Windows 7. To my surprise, Windows Update worked perfectly and then I tried iTunes and that installed perfectly as well. I don't know what is different, why it worked today but not yesterday. I didn't do anything but different.

My guess is that since a common element of these install processes is the Internet, that there was something wrong with my wireless connection yesterday that was resulting in corrupt files being downloaded from whatever servers I was accessing. But I feel that if this is the problem, Windows should be smart enough to tell if incomplete data is being transmitted and re-send packets...

Anyway, my laptop works perfectly now. I know this is just going to piss someone off who is still struggling with their own problems...